BMO is one of the friendliest characters to build, because the whole design comes down to a teal body, a pale green screen with a face on it, and a handful of coloured controls. Finn and Jake's living game console can be made as the traditional box or translated into clothes you can actually sit down in. I've ordered the ideas below from felt-on-a-hoodie versions through sewn dresses to foam shells, with versions for kids, toddlers, plus sizes and pregnancy along the way. Each one covers the base outfit, hair, makeup, shoes and a prop, so borrow the parts that suit your sewing skill and your day.
One Teal Across Felt, Fabric and Paint
BMO is almost entirely one colour, which sounds easy until you lay a teal shirt, teal leggings and a teal felt panel side by side. Teal shifts a lot between materials. Knits look darker, felt looks chalkier, satin looks brighter, and paint dries a shade away from the swatch on the lid. Stand back and the costume reads as a patchwork instead of a single console.
I buy the base garment first and match everything else to it in daylight, carrying the garment or a cut swatch. If a piece is close but not right, I let it become the lighter mint instead, since BMO's screen and some trims are lighter anyway, and a deliberate second shade looks planned. Dyeing a white cotton shirt gets a near-perfect match, but polyester barely takes ordinary household dye, so check the label before you try.
Sewing On Controls That Stay Put
The buttons and the yellow cross are what make the costume read as BMO, and they're also the first things to fall off. Glue alone is usually the culprit. Craft felt is fuzzy, and most fabric glue grabs the loose fibres rather than the garment, so the pieces peel at the corners once the fabric starts to flex.
- Cut the screen, pad and buttons from wool-blend felt if you can find it; it pills less than acrylic craft felt and keeps a cleaner edge.
- Fuse each piece with paper-backed fusible web first, then stitch around the edge by hand or with a narrow zigzag. The fusing holds it flat and the stitching keeps it there.
- For raised buttons, stack two or three layers of felt, or back each one with a thin foam circle, before stitching it down.
- On stretch fabric, sew with a zigzag or stretch stitch so the thread doesn't snap when the knit pulls.
- Keep the black outlines thin. A heavy outline makes small buttons look like holes.
1. Classic BMO Box Cosplay
The box is the version people point at from across a hall, because nothing else has BMO's flat rectangular shape. Corrugated cardboard or foam board both work; foam board is lighter but dents the first time you lean on a wall. Paint the teal in thin coats, then add the pale screen, smiling face, yellow directional pad, coloured buttons, slots and side lettering. Cut the arm holes wider than seems sensible and leave the bottom open. Underneath, a teal long-sleeve shirt, leggings, four-finger gloves and teal canvas sneakers keep every visible bit on palette. Tuck your hair in or wear a close teal cap, and keep makeup minimal since the screen carries the expression. The detail I never skip is padded straps inside, so the weight rests on your shoulders instead of the box edge digging into your collarbone.
2. Human BMO Dress Cosplay
This is the BMO I'd sew for anyone planning a full convention day, because a dress lets you sit, queue and use the bathroom like a person. Start with a straight or A-line teal dress that falls around the knee. Cut the screen, face, directional pad, slots and controls from felt and stitch them on rather than gluing; felt glued to a polyester dress starts lifting at the corners after a few hours of movement. Run black lettering vertically down one side as a nod to the console casing. A short aqua bob wig with neat bangs, or a washable spray colour, handles the hair, and black liner, rosy cheeks and a small curved smile near one cheek finish the face. Teal tights, white platform sneakers and a little controller or cartridge purse to carry.
3. Casual BMO Hoodie Cosplay
If you need BMO by Friday, this is the one. An oversized teal hoodie takes a felt screen and console controls on the chest, with the yellow cross and the red, green and blue buttons underneath. I make the whole front panel removable, tacked on with a few hand stitches or safety pins from the inside, so the hoodie goes back into normal use in November. Put the black letters down one sleeve instead of covering the whole garment. Teal joggers, or bike shorts over matching tights if it's warm, then a mint bob wig under the hood or two small buns. Defined lashes and small pink cheek circles are plenty. Teal high-tops, fingerless gloves and a controller-shaped crossbody bag make it easy to wear on a train or at a school event.
4. BMO Overall Cosplay
Overalls are a clever base because the bib is already a rectangle sitting exactly where BMO's screen belongs. Wear short or full-length teal dungarees over a fitted pale mint T-shirt, and stitch a light green fabric panel onto the bib with black eyes and a smile. The directional pad and buttons can go across the waist and pockets. Denim is thick and stiff, so I hand-stitch appliqués with a heavier needle or use a fabric glue made for denim and press it well. A short blue-green wig, soft green shadow, pink blush and graphic liner give it a lively human feel. Teal socks with white or mint sneakers, a small black belt bag standing in for the cartridge slot, four-finger gloves and a foam controller light enough to carry all day.
5. BMO Jumpsuit Cosplay
A teal utility jumpsuit gives the cleanest head-to-toe line of any soft version. Pick one with a front zip, roomy legs and enough flat space on the chest for the screen. The controls can be foam or felt across the stomach; either way, outline each shape in black, because a red button on teal fabric loses its edge in photos taken under hall lighting. The lettering runs down one outer leg. A chin-length teal wig with rounded ends and simple cartoon makeup with wide liner, soft blush and a cheerful smile keep the face on theme, while matching gloves and teal lace-up boots carry the colour all the way down. A small rectangular backpack painted as BMO's battery panel, with black speaker dots, is a prop that also holds your phone.
6. BMO Skater Cosplay
The skater version is mostly shopping, with one small sewing job. A boxy teal T-shirt gets a handmade screen face and felt controls, worn with loose teal cargo shorts, striped crew socks and white skate shoes with mint laces. A blue-green beanie over short hair is the low-effort route, though a choppy aqua wig reads far more clearly as the character. Clean skin, graphic lower lashes and two pink cheek circles for makeup. Add the black lettering to one side of the shirt, or put the controller design on a foam skateboard prop. I'd keep the knee pads, honestly. They match, and they're the reason you can kneel on a curb for group photos. It's a good pick for warm halls and outdoor meetups where a shell would cook you.
7. BMO Pleated Skirt Cosplay
A school-uniform BMO is easy to assemble from separates: a teal pleated skirt, a fitted blue-green sweater vest and a white short-sleeve shirt underneath. The vest becomes the control panel, with a pale screen patch, a smiling face, a yellow directional pad and coloured buttons. Knit vests stretch, so I back each appliqué with a light fusible interfacing before stitching it down, which stops the screen from rippling every time you move. Teal knee socks with white sneakers or flat mint loafers, a short aqua wig with blunt bangs, and thin liner with peach blush rather than heavy face paint. A rectangular book bag decorated as BMO's back panel is the prop. The four-finger gloves are optional, though they're the one detail that ties a human outfit back to the cartoon.
8. BMO Tutu Cosplay
Tulle gives BMO movement the box never could. Start with a fitted teal top carrying a light mint screen and a happy face, with the yellow cross, red circle, green circle and blue triangle placed below. Build the skirt from layers of aqua and mint tulle over teal shorts or leggings; I put the mint on the outside so the skirt reads lighter and closer to the screen. Striped tights add contrast if you want it, with white high-tops or teal ankle boots. Style an aqua bob with a mint bow, then green shimmer, black liner and rosy cheeks. A lightweight foam controller wand is all the prop you need. Sew every control on, because glued felt on a stretch top pops off the first time you dance.
9. BMO Retro Arcade Cosplay
This one leans into blocky arcade graphics. Wear a teal mini dress or tunic over opaque leggings and outline the screen and controls with black fabric tape so the edges look pixelated. Build the face from square felt pixels, not curves. A cropped bomber with pixel patches and lettering down the sleeve adds a second layer you can take off when the hall warms up. A turquoise wig in a high ponytail or layered bob with small cube clips, graphic liner and a few pixel squares near the temples keep the face digital. Fabric tape is the weak point: it lifts at the ends wherever the dress curves, so I put a couple of stitches through each corner. Teal leg warmers, white platforms and a light foam joystick bag or token pouch finish it.
10. BMO Pixel Art Cosplay
Pixel art BMO takes patience more than skill. Cut a rectangular tunic from teal felt or a sturdy fabric, then build a checkerboard screen from pale green squares, with smaller squares for the eyes, mouth, pad, buttons, slots and lettering. I cut all the squares from one cardboard template and lay out the full face on the tunic before a single stitch, because one crooked row throws off the whole grid. Wear a fitted teal shirt and leggings underneath so nothing off-palette shows at the arm and leg openings. A blunt aqua wig with square clips in yellow, red, green and blue, angular liner and square blush marks match the theme. Teal foam shoe covers keep the blocky shape. Make two or three spare screen faces so you can change BMO's mood between photos.
11. BMO LED Screen Cosplay
An LED screen is the showpiece build in this list, and the one I'd only suggest if you've made a foam shell before. Make the body from light EVA foam with ventilation at the sides and bottom. A diffused LED panel behind the pale screen can show simple eyes and a mouth; the diffusion matters, because a bare panel glares in every photo and washes out the face. Layer painted foam for raised controls. Under the shell, a moisture-wicking teal shirt, leggings, gloves and supportive sneakers, with a thin teal cap so your hair doesn't snag. Makeup can stay minimal. Put the battery pack in a padded inner pocket, hide the wiring, and place the switch where your hand can reach it without taking anything off. Wear it around the house for an hour first to check heat, vision and weight.
12. BMO Interchangeable Face Cosplay
BMO's moods change constantly in the show, so a swappable face is a fun idea to build around. Make a teal foam-board body with a recessed pale screen, then cut light face panels for happy, surprised, sleepy, excited and worried, attached with hidden hook-and-loop tape or magnets. Any magnet has to be fully enclosed in its panel; loose small magnets are a genuine hazard around children. Add raised directional controls and coloured buttons below. Teal sleeves, leggings, gloves and flat sneakers, plus a fitted aqua hood that's far cooler than a wig. Skip the face makeup entirely. Keep the spare faces in a teal cartridge-shaped shoulder bag so a swap takes seconds during a photo or a skit.
13. BMO Foam Armor Cosplay
Armour turns BMO into more of a robot, though the friendly screen keeps it from looking fierce. Over a teal bodysuit or long-sleeve top and leggings, build a chest plate with rounded corners, a pale screen, raised controls and slim shoulder pieces, plus forearm guards, knee pieces and shoe covers. EVA foam bends with a heat gun and holds the curve once it cools, which thin craft foam won't do. Black panel lines suggest mechanics without adding bulk. Pair it with a sculpted aqua wig or a teal hood, metallic mint shadow, sharp liner and small coloured cheek dots. A cartridge backpack and wrist controller round it out. Seal the foam before painting or the teal goes blotchy, and use elastic straps so you can still sit down.
14. BMO Cyberpunk Cosplay
Cyberpunk usually means black and neon, but BMO needs to stay bright, so I keep the base teal and let the tech show in the trim. A fitted teal jumpsuit with reflective mint piping and a cropped structured vest shaped like the console panel does the job. Add a softly glowing screen patch, raised buttons and black circuit lines along the sleeves and legs. Teal platform boots with secure soles, fingerless gloves, a sleek aqua bob with silver clips, iridescent green shadow and geometric liner. Battery light strips go only on flat areas, since the joints in a strip fail where it bends over and over. A translucent controller bag or glowing cartridge is the prop. Leave weapons out; they're off-character for BMO anyway.
15. BMO Kawaii Cosplay
Kawaii BMO is all soft shapes. A mint-and-teal pinafore carries a pale screen across the bib, with oversized eyes, a tiny curved mouth and embroidered pink cheeks. I make the directional pad and buttons as little stuffed felt pieces, filled just enough to stand up off the fabric. Under the pinafore, a white puff-sleeve blouse, teal tights and rounded mint flats. Two short aqua pigtails held with button-shaped clips, wide lashes, gloss and round blush. Carry a mini plush controller or a small rectangular bag with a smiling screen, and add four-finger mittens for the cartoon proportions. It suits daytime events and meetups where you'll be hugging friends and posing with kids.
16. Glam BMO Cosplay
Glam BMO swaps felt for shine. Start with a teal sequined jumpsuit or fitted dress over opaque tights, then make the screen from pale satin edged in narrow black trim. Sequins are the awkward part: machine-stitching through them cracks the sequins and dulls the needle, so I hand-stitch the satin screen between rows or use a fabric glue that says it bonds to sequins. Glossy appliqués handle the yellow pad and the red, green and blue controls. A short structured cape or cropped teal jacket adds polish while leaving the front visible. A sleek aqua bob, luminous mint shadow, winged liner and a glossy neutral lip, with silver-and-teal ankle boots on stable heels. A metallic cartridge clutch and button earrings finish it. The shine dresses BMO up for a party or a stage without losing the cartoon.
17. BMO Pajama Cosplay
When comfort is the whole point, a pajama BMO wins. A loose teal onesie or matching pajama set gets a large pale screen sewn across the torso, a sleepy closed-eye face, soft felt controls and padded slots. A removable teal hood with squared corners echoes the console shape without covering your eyes. Relaxed braids or a short aqua wig under a sleep cap, soft blush, a little mascara and tiny painted stars near the eyes. Teal slipper boots with nonslip soles are much safer on stairs than open-backed slippers. Carry a mint pillow or a plush controller. Most onesies are polyester fleece, which scorches under a hot iron, so stitch the appliqués instead of fusing them. It's best indoors, at pajama parties or as a lazy group costume.
18. BMO Summer Cosplay
Heat is the enemy of most BMO builds, so this version strips everything back. A teal sleeveless romper, or a tank with high-waisted shorts, carries the screen and face on top with the controls around the waistband. Thin felt or iron-on vinyl stays far cooler than foam. Teal ankle socks and ventilated white sneakers handle long periods of standing. If it's hot, trade the wig for washable teal hair colour or a mint headband; a synthetic wig traps a lot of heat at the scalp. Waterproof liner, light green shadow and pink cheek circles hold up to sweat better than cream colour does. Carry a small controller-shaped fan or a cartridge crossbody bag, and wear sunscreen for anything outdoors.
19. BMO Winter Cosplay
For a cold evening, the trick is layering so the screen stays visible. Put the pale screen, smiling face, directional pad and buttons on a teal sweater, then wear a matching puffer vest open at the front. Fleece-lined teal leggings, thick socks and waterproof mint boots cover the bottom half. A blue-green bob goes under a teal beanie, or put the side lettering on the hat itself. Cold air dries skin, so moisturise first and keep the makeup simple: black liner, rosy cheeks and a touch of pale green shimmer. The four-finger mittens are that rare accurate detail that's also warm. A rectangular backpack decorated as the battery compartment works for parades, outdoor festivals and chilly Halloween nights.
20. BMO Raincoat Cosplay
Rain softens cardboard fast, so a soft BMO under a clear coat is the wet-weather answer. Wear a teal sweatshirt and waterproof teal pants under a clear or pale aqua raincoat, with the screen and controls on the sweatshirt so they show through. Waterproof vinyl appliqués stuck straight onto the coat are the other route. Add black side lettering, a mint hood and four-finger rain gloves. Pin a short aqua wig securely under the hood; I'd skip spray hair colour here, because it streaks the moment it gets wet. Waterproof eyeliner and pink cream blush survive damp air, while loose glitter just slides off. Teal rain boots, a waterproof cartridge bag and an umbrella painted with game buttons turn the prop into something useful.
21. BMO Plus Size Cosplay
For a plus size BMO, start with the base you already feel good in: a teal swing dress, a relaxed jumpsuit or a soft tunic with leggings. Then scale the details to you. A screen that's too small for the torso looks like a patch, so I cut the screen first, pin it on while the base is being worn, and size the pad, buttons and slots to match. Flexible felt or fabric appliqués bend where you bend; stiff panels don't. A cropped teal jacket adds shape while leaving the controls in view. An aqua wig in whatever cut suits you, graphic liner, pink cheeks and mint shimmer. Supportive teal sneakers or wide-fit ankle boots, and a controller crossbody bag with an adjustable strap that sits where you want it.
22. BMO Maternity Cosplay
Pregnancy and a box costume don't mix, so the maternity version is built on a soft teal dress. An empire-waist or stretchy T-shirt dress gives room to move, with the pale smiling screen across the chest and light felt controls over the upper bump. Nothing rigid goes there. A teal cardigan adds coverage while the front stays easy to see, with breathable shorts or leggings underneath and cushioned mint sneakers or flat boots. An aqua headband on your own hair is cooler than a wig. Gentle makeup: defined lashes, green shadow, rosy cheeks. A small controller handbag is enough, so skip heavy props and anything belted. I attach the controls with safety pins from the inside, which keeps the dress wearable afterwards.
23. Kids BMO Cosplay
For kids, I go soft every time. A closed box over a child's head blocks their view of steps and curbs, so build a short teal tunic from felt, fabric or thin foam instead. Add the pale screen with a happy face, coloured buttons, a yellow directional pad and clear side lettering, and layer it over a teal long-sleeve shirt with leggings or sweatpants. Children pull off anything itchy, which is why a soft aqua beanie often beats a wig. Two pink cheek circles are plenty of makeup, or none at all. Well-fitting teal sneakers, a plush controller or tiny cartridge bag, and a trial run at home for arm movement, visibility and bathroom trips. Sew small pieces down hard; anything detachable gets lost by the second street.
24. Toddler BMO Cosplay
Toddlers need a BMO with nothing rigid and nothing small enough to swallow. Teal overalls, a romper or a padded tabard over a cotton shirt does the job, with a pale fabric screen sewn on and the face embroidered or securely appliquéd. Make the controls flat fabric that small fingers can't pick off. A soft teal hood or knit cap gives the rounded character shape without covering eyes or ears. No wig, and no makeup beyond optional child-safe pink cheek colour. Teal socks and flexible sneakers. Stitch a plush controller onto the outfit instead of handing over a prop that'll be dropped in the first five minutes. Check that they can crawl and sit in it, and that you can reach the diaper without undressing them.
25. BMO Cardboard Cosplay
Cardboard BMO is the cheapest build here, and it can still look neat if you plan it. Pick a clean box wide enough for your shoulders, reinforce the seams with tape, cut generous arm holes and leave the bottom open. A coat of white primer first helps a lot, since raw brown cardboard soaks up paint unevenly and the teal comes out muddy. Then thin coats of teal, fully dried between. Add a pale paper or fabric screen, a black smiling face, cardboard buttons, the yellow pad, speaker holes and side lettering. Teal shirt, pants, gloves and canvas shoes underneath, hair under a breathable cap, minimal makeup. Padded inside straps keep the weight off your head, taped corners spare the people beside you, and you won't need an extra prop. It's a good first build for a beginner.
26. BMO EVA Foam Cosplay
EVA foam is where I'd go after a cardboard BMO, because it's light, durable and takes a smooth curve. Draft a rounded rectangular torso pattern in paper first, then cut the foam panels and join them with contact cement, which flexes with the foam where hot glue tends to crack. Add a recessed screen opening, layered controls, side letters, speaker dots and a removable back panel. Seal the foam before painting it teal so the surface looks even. Underneath, a teal compression shirt, leggings, gloves and athletic shoes with matching foam covers, plus a fitted teal hood for the robotic outline. Keep makeup simple. Adjustable shoulder straps, vent holes and soft padding wherever foam touches skin are what make it bearable after a few hours.
27. BMO Detective Cosplay
BMO plays detective in the show, so this version has a real story behind it. Wear a teal tunic or dress with the pale screen, smiling face, directional pad and buttons, then layer a beige trench coat over it and leave it open so the controls stay visible. A trench can swamp a smaller person, so I roll and pin the sleeves rather than cutting a coat you might want to keep. Add a detective cap, teal tights and brown or mint lace-up shoes. A short aqua wig under the hat, subtle liner, rosy cheeks and one raised-eyebrow line. A light magnifying glass and a small notebook are the props, and a cartridge bag holds your things. It's easy to explain at a school event and fun inside a group mystery theme.
28. BMO Cowboy Cosplay
Western BMO is a party costume first. A teal button-front shirt or dress takes the screen face and game controls, a teal or light tan vest carries the black side lettering, and jeans, teal trousers or a knee-length skirt go below. Choose a soft cowboy hat with an aqua band and button decorations. A hat sitting on top of a wig slides around all night, so I pin the wig firmly first and push a hat pin through both. An aqua bob or two low braids, peach blush, mint shadow and a little curved smile. Teal western boots and four-finger gloves. A foam hobbyhorse dressed as a controller is the funny prop and a small satchel is the quiet one. Leave realistic weapon accessories at home so it stays family-friendly.
29. BMO And Football Duo Cosplay
Football is BMO's reflection who lives in the mirror, which makes a clever pair for two friends. One person wears a classic teal dress, jumpsuit or tunic with the bright smiling screen and controls; the other wears the same base with the details mirrored. Mirrored means the controls flip side to side, so I cut every felt piece for the second costume from the first set's templates turned face down. Both get short aqua wigs, matching graphic liner, pink cheeks, teal tights and white sneakers. One carries a lightweight mirror frame and the other a controller. Give the screens different expressions so each character has a personality, and add matching cartridge bags. It's great for side-by-side photos and short skits.
30. BMO Emotion Group Cosplay
An emotion group is the easiest way to get several friends into BMO with one pattern. Everyone wears the same core build, dress, tunic, jumpsuit or box, with matching controls, side lettering, gloves and shoes, and only the screen face changes: happy, sleepy, surprised, excited, confused. Makeup follows the face, so pink cheeks for happy, lifted brows for surprise and closed-eye liner for sleepy. Props can differ from person to person. The hard part is the teal. Buy fabric or paint for the whole group at once from the same stock, because two teals from different shops look like two different characters standing side by side. Siblings, families and convention teams all suit this one.
Living Inside a Box for an Afternoon
Several builds above are boxes or shells, and building one is only half the job. Wearing it is the other half. A rectangle as wide as your shoulders won't pass through every doorway straight on, won't let you sit in most chairs, and catches on people in a crowded aisle.
Before the day, I wear the shell at home for an hour and do what the day will ask of it: sit down, climb stairs, open a door, pick something off the floor, use the bathroom. Whatever fails, fix it there. It's usually the arm holes (cut them bigger), the straps (pad them more) or the sightline (lower or widen the eye opening).
- Wear a thin base layer that wicks sweat, because the inside of a box warms up quickly.
- Make sure you can lift it off over your head in one move without a helper.
- Pack a small repair kit with tape, safety pins, a glue stick for paper screens and a couple of spare felt buttons.
- Ask a friend to walk beside you in crowds, since your side view is close to nothing.
Teal, a Screen and a Smile
Every BMO here comes back to the same short list: teal everywhere, a pale screen with a face, and the coloured controls in the right places. The box gives you the silhouette. Dresses, jumpsuits, hoodies and overalls give you a day you can actually sit through, foam and LED builds are for makers who want a project, and felt appliqués get you there by tomorrow. Whichever one you make, check how far you can see and how freely you move before you leave the house. Then play the character a little. BMO is cheerful and slightly odd, and that sells the costume more than any button does.
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