One day, I was there to get my weekly comics, and noticed they had two first-generation GameBoys for $3 each, and I was suddenly struck with a Real Gears inspiration, so I bought 'em both.

My first step was to measure one of the GB's, then create a cardboard mock-up, so I can work out the transformation and positioning of parts. Next, I had to figure out what to use for various parts, such as legs and arms, etc. Bionicles to the rescue!
After some experimentation, I've decided my best bet for his legs are "beast-type" (hey, it worked for Dropkick!), as shown here:




His feet are what I originally created for my project to re-shell an Alt Tracks with a G1-ish Corvette Stingray, but I determined that using an actual Alt Tracks was gonna end up being far more trouble than it was worth, so I reset my sights on an extra Side Swipe. That project is one of many currently on back burners.
I may end up using some other Bionicle feet, though, as these seem a bit small.
Anyway...my original GameBoy mock-up was made with printer card-stock, but that's too flimsy for this, so I've started re-doing it with some thin cardboard, instead. I've used hot glue to "spot-weld" the green pieces in place inside the GB shell pieces, and it's turning out pretty good so far. I'm gonna have to fiddle with the placement of the green bits though, 'cause the bottom of the GB is ending up slightly out of alignment with the top half.
I have no idea how the mock-up ended up so much taller than the real GB case, since I measured and re-measured at least twice, but there you go. *shrug*
It looks like I can just shorten the top a little when I remake it with the cardboard, though, without affecting anything else.





After I tweak the positioning on those parts a bit, I'll move on to mounting the middle of the shell on his thighs. Then it's on to working on his arms and head!
I'm planning to make one an Autobot and the other a Decepticon, and my current backstory idea involves them being brothers. They were two of a series, and a single Spark accidentally got split between them. I'm not sure yet what that means for their minds/personalities, other than their disparate faction allegiences are a direct result.