"It's Adventure Time, 
Come on, grab your friends 
We'll go to very distant lands 
With Jake the Dog and Finn the Human 
The fun will never end, it's Adventure Time!"

Hey Instructabrarians, What Time is It?...... ADVENTURE TIME!  

Folks, I frickin' LOVE this show!  Aside from perhaps Regular Show (Hmmm, perhaps I should dedicate a future 'ible to that too...), Adventure Time is, in this author's opinion, the single greatest show ever to come out of 2010.   And who can argue?  This Cartoon Network original series about a young human boy (Finn The Human) and his magical transforming dog (Jake The Dog) as they travel the mystical Land Of Ooo is such an amazing character based show, featuring such an excellent cast of characters, stellar animation, great humor and Crowning Moments Of Heartwarming  that it's hard not to fall in love with it.   

But perhaps one of the things I love best about AT is the show's own extreme dedication to it's fans.  Frederator Studios has done a tremendous job of reaching out to their fans from providing them with the show's storyboards and character sketches  to even creating an entire blog just to showcase all of the fantastic fan art people have created.  That's dedication and as both a fan of the show and of reverse engineering I have a lot of respect for that.

Now I know I've posted quite a bit of interesting reverse engineering projects based on PIXAR characters (ie Luxo Jr, Auto, my Microbe Obliterator cleaning bot) but for my first and only Adventure Time fan art I knew I had to make it great, as a tribute to both the show and its fantastic fanbase.  This build took me a long time to complete but I am finally done and I can't wait to show all of you!  So in honor of the last week of Instructables' Video Game Month (aw....) and the show's very first anniversary (April 5th), I decided to build a real working replica of Finn and Jake's cute video game system Beemo!

Also, I just realized this- 10th Official Step By Step Instructable ever! 

Editor's Note: Special thanks to Daniel van Beek for his Beemo Fan Art and my Instructabrarian shout out for this week also goes to houseofdarkly for this site's very first Adventure Time themed instructable.  Finally, since Adventure Time is a show that seems to strive on How To guides, I offer this Instructable in response to Frederator's Finm Hats.
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SHIFT! (author) 3 years ago
ATTENTION EVERYONE: I'm sorry but different to what I might've said in the past, I do not sell any Beemos Replicas.  The reason being is because, at this current time, the last one took an insane amount of time to make (four months for one) and I unfortunately now that I'm in school, I don't have the time.

HOWEVER, should some miraculous blessing bestow me and I do come up with a better method of building him or the University Control Brains do find the time, I might put one up on auction on ETSY.  And I will of course add in the link.

Dude, make a Kickstarter.com campaign, maybe. Not sure if it qualifies though.

happyjo4 years ago
Hamacow!!! You are like THE most devoted Adventure Time fan ever! :D
:D Mathematical Beemo!
SHIFT! (author)  happyjo4 years ago
Thanks happyjo! You know, I've been waiting a really long time to be able to finally post this project on your Adventure Time Fan Group
happyjo SHIFT!4 years ago
:D yay! Well, I feel absolutely ecstatic! :D
I have to say that I've not seen the show but that little guy is just ADORABLE.

Great job!
SHIFT! (author)  jessyratfink4 years ago
Thank you jessyratfink! That was actually one of my main goals from the start- to make BMO look appealing to people who haven't seen Adventure Time before. Thanks!
ciao777 months ago


can you show how did you solder wires at new power switch?

WOW great instructable! (I know I'm really late to the party lol) Have you considered modding beemo into other things?
For example a aux. plugin stereo. Not that there is anything wrong with a classic system.
How long did that take???
SWIFT!2 years ago
Ah, okay. Thanks for the clarification.
SWIFT!2 years ago
What is the thin Unflexible plastic sheet used for and the extra two sheets of 1/16 plexiglass?
SHIFT! (author)  SWIFT!2 years ago
That's for the controller. I gave 10'' by 5'' as an estimation for how someone might build his tiny boxy control pad from scratch. If you want, you can save the time by using a NES controller instead- it has the same relative pin out to a GameBoy Color.
SHIFT! (author)  SWIFT!2 years ago
The body
SWIFT!2 years ago
I thought the six sheets were for the body. I used the 6 sheets for the body. But you put a piece of 10" by 5' plastic sheet in the materials. What's that for.
SWIFT!2 years ago
Hi Shift!
I wanted to know if you had a better picture of how you connected the leads to the gameboy colors buttons on the circuit board. Also do you have a clearer picture of how the inside of the plastic container housing is wired? Thanks in advance.
It looks so cool! I would really like to buy your very own BMO Gameboy Color Mod Replica that you made! I would likely pay $20.50 from my piggy bank. It's really Really
ReallY ReAlLy REalLY REaLLY REALLY Awesome!! 0 caps 1 cap
2 caps 3 caps 4 caps 5 caps all caps
SHIFT! (author)  Hoozywoozy27842 years ago
Sorry BMO is not for sale.
How much is it to pay for your playable BMO? You know, the GBC Mod you made?
salvegames2 years ago
Hey there! I have a game boy color, and it's working 100%, except for one thing. The internal power switch (meaning the metal switch underneath the plastic one) isn't there anymore. The little metal box that houses it is still there, and all leads are still soldered and intact. I would replace it with another switch, but I noticed that there are MANY pins connected to it (not just two). What are all those pins for, and can I replace the Nintendo switch with some other generic one, or maybe get a mod kit from somewhere like kitsch that happens to fix the problem? Oh, and some other info: -I still have the plastic external power switch handy, but I welcome alternatives. -I am able to take the game boy apart. -I understand electronic parts and am pretty good at soldering. Thank you so much!
SHIFT! (author)  salvegames2 years ago

So I don't know that much about the actual pinout from the Gameboy Color switch but IIRC it was surface mounted to the board with about four or five different pins connected. If you have the original plastic power switch available, I would suggest trying to use it rather than replace it with a brand new one. I remember running into a similar issue with BMO and a standard 2 or 3 pin switch does not work as an alternative.

Hope this helps.
dtooth2 years ago
you should make lot's and the sell them I know i would buy 1 or 2
SWIFT!2 years ago

Could you measure you finished copy and give me an exact size of the finished product? I want to get the plexiglas as close as possible to yours.
SHIFT! (author)  SWIFT!2 years ago
Sure Swift! Just give me a while though, I'm currently at school and don't have BMO on me at the moment.

If it helps, BMO's height is exactly the same as a gameboy color's and follows the exact same proportions as the papercraft on Cartoon Network.
jvr0s2 years ago
First off, that is a fantastic job! I'm incredibly impressed with it!
I had a question, Does each button take two cables to connect to the board of the GB? Also, where did you buy the buttons and circuit board? It'd be my first time trying something like this, so I have no idea where to start.
Thanks so much for the instructions, if I manage to get this together I'll die a happy man.
SHIFT! (author)  jvr0s2 years ago
Hey jvr0s!

Terribly sorry it took me this long to respond back to you, I was out visiting my family in California and didn't get a chance to check my instructables email.

First, thank you very much for your mathetmatical response! To address your question, I am a bit confused what you mean by "cables". Are you referring to the individual ground and circuit wires themselves or are you referring to the singular cable that connects everything to the controller? In the former, No. The controller buttons only have one wire leading to the controller PIC board. The other wire leads directly to GRND (ground), in order to be connected to the entire controller terminal.

I have to warn you- if this is your first time doing this, attempting this project is ill advised. I ended up going through at least two GBCs before I could get a working prototype myself. But if you're determined, it's not impossible.

Also Radio Shack is your best friend!

Good Luck!
IamBMO2 years ago
Whoa bro! this BMO totally knock the shells! awesome job man! I really like it as an adventure time fan my favorite part you can make it like a whiteboard and you can change BMO's face. How long does this take to make???
loudpopper3 years ago
Sir, you created the perfect BMO, especially for us, Adventure Time Fans. Well, can i ask how much is the cost for all of the materials (excluding gameboy) ? And would gameboy advance sp would do instead of gameboy color? Your reply would be appreciated highly :) Thanks!
i have never seen the show, but, this is awesoome!!!
megaduty3 years ago
So gotta make this for my daughter! Thanks!
FFDPfanJL3 years ago
can you use regular game boy advance games with this? if so id like to build this
Treeboy213 years ago
Hi first of all love the project.

Im just having trouble understanding the button wiring and was wondering if it was at all possible to have some help. If its not to much work i was wondering if you could draw some line between connections on this picture.

SHIFT! (author)  Treeboy213 years ago
Hi Treeboy21,

Sorry this message took me a while to get to you.

Anyway, I apologize but I didn't happen to draw any circuit diagrams or anything while I was working, I was really just testing out connections while I was working and I don't really seem to remember that much.

What I suggest doing is using a volt meter and testing out the connections between the button pads. It may seem a bit daunting at first, but after you find the common ground connection, everything falls into place.
mechaninja3 years ago
Woah... we have memes, then a drawing of BMO, then drawings of a GBC, then schematics... trippy bro...
halo grunt3 years ago
I love this instructable, but, a game- boy game is called a game cartrige not disc, no affence
Do you think this would work with the Gameboy Advanced instead? :O
I really dun wanna take apart my Gameboy Colour, or buy a new one for this~
SHIFT! (author)  BlueMoonWishes4 years ago
Really depends what Gameboy Advance you're talking about. If it's a GameBoy Advance SP then you can certainly take it apart and refit it inside the small box. If it's a Gameboy Advance Original, however, then the only way you can do it is if you made Beemo much much fatter than he was in the show, since the horizontal shape of the original won't fit well within Beemo's box body.

I actually tried experimenting with other Gameboys before I decided on a Gameboy Color and found the ones that work the best are the vertically designed ones, since they have the most in common with Beemo's body.
ben ster SHIFT!3 years ago
have you thot about make a bisinus
Oh okay cool! :D
Yeah, I was thinking of using the original GBA, but I think I can get an old SP from a friend or something. Thanks~
Your BMO is soooooo adorable! I'm really excited to get started on him :D <3
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