Turn your Game Boy or Analogue Pocket into Adventure Time's lovable walking handheld console with Virtual BMO!

I made this for my daughter and thought I would share with any of the Adventure Time fans out there. Just place the downloadable Game Boy ROM  onto a writable Game Boy cartridge or similar or download the .pocket file for Analogue Pocket users and you're away! Or, if you just want to have a look, play here in the browser.

Change Beemo's expression at will or browse his desktop to find all sorts of surprises. There is now a playable game to be found on the desktop too!

The latest update features a fully playable re-imagining of the action platformer Guardians of Sunshine - from the episode of the same name all the way back in S2 of Adventure Time. You'll find a total of 10 levels to play (4 levels + a Boss fight on NORMAL MODE and the same again on HARD MODE but with harder platforming layouts). Collect coins and bomb baddies to achieve a perfect score!

Follow me on Instagram or Mastodon to stay up to date on my Game Boy development news or check out my other games. Thanks for playing!

BMOChange Expression
Go to Desktop
D-pad, A or B
Arrow Keys, Z or X
DESKTOPMove Cursor
Arrow Keys
Throw Bomba
Drop through platforms
Open Menu
Arrow Keys

A Game by Gumpy Function | Mastodon | Instagram
Music by Beatscribe
SFX by Tronimal
Playtesting by ProximitySound

Made with GB Studio using the Platformer + mod.

Disclaimer: This is a free fan made game not intended for sale. All trademarked characters belong to their respective owners.

v2.0 - 27th October 2021
- Added Desktop feature.
- Added Football.exe (Extra Facial Expressions).
v3.0 - 22nd October 2022
-Added 'Guardians of Sunshine' platformer game.
v.3.1 - 15th November 2022
- Minor Bug Fixes.

Rated 4.5 out of 5 stars
(38 total ratings)
AuthorGumpy Function
GenreSimulation, Adventure, Platformer
Made withGB Studio
Tagsanaloguepocket, bmo, Fangame, Game Boy, Game Boy ROM, gbstudio, pocket


Download NowName your own price

Click download now to get access to the following files:

BMOv1.0.gb 128 kB
BMOv2.0.gb 128 kB
BMOv3.1.pocket 512 kB
BMOv3.1.gb 512 kB

Development log


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(1 edit)

this is awesome

so cool


Amazing turned all my handhelds into BMO models! Thank you for making this public <3

This is an incredible idea!!


This is the coolest thing ever!! I´ve wanted to play GoS ever since I saw the episode release, so that´s a 7/8 year old me dream complete! And the BMOS is cool af too!! Aaaaaaaah thank you so much!!!!


My pleasure! I made this precisely for people like you :D


now imagine if they released it on ios or android i would 100% get it as fast as possible


omg what


this is sooo cool i lik it :DD


I just got a modded gameboy in the color of BMO and an EZ flash cart so what better way to celebrate than to have this on it! Amazing job! 

Rad! Thanks so much! Enjoy :)

This is awesome. I didn’t expect the whole computer thing



maybe it doesn't work for some reason, but when i click in the folder icon i cant click the options, it only lets close the folder

Yep, it's not a bug or anything. While it looks like an open folder, it is actually just a dialogue box. So all you can do there is close it on A press.

oh i see, lovely tho, i would like to see more games from you in the future

Thanks! I'm currently mid development on Unearthed and Cupid, both of which you can play (the jam version and demo respectively) from my profile page :)

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omg thats really cute my son would love this

Thank you! Yes, I made this for my kids. They love it.

Please Tell Me How To play The BMO Adventure Character is My Fav Please Tell Me How To Play:(

(Please Tell Me)

please can you do pc version this gonna be cool if there pc version

because i only have pc and mobile i dont have game boy

Well, you can play in browser on the PC or mobile. Or you can download the .gb file and play it using a Game Boy Emulator on your PC or Device.

Yay Thanks You For Reply:) Well When I Play The Game Is Very Good! And Fun!

Aww cute BMO

Shift key doesn't work for some reason

BMO can't talk/the shift key won't do anything on the pocket version as noted in the description. Or, if you aren't playing in browser and using an emulator, you will need to check how the emulator's input is mapped to the keyboard.

this is so cute!

what are the keybind :L

I have added the keyboard controls in the description.

I was playing this on my ez flash omega on my gba sp and i take out the cartridge for no reason and it looks CREEPY but i find it cool

¿final version?

I don't think so. I am a bit busy with other game development projects at the moment but I will still add to this over time. 


I love it!!!


Thanks so much :)

good job


I haven't watched adventure time in years but this is pretty well made, nice work

Thanks very much :)

nice BMO ;-;

Very cuuuteeee!

<3 BMO