Well I guess it's smaller by a ton for people who have a cell phone, a thick wallet, an MP3 player (soon to be fixed by Play-Yan), causing them to have 15-pound pants. But that's no excuse for the inability to play GBC games or have a proper link cable. Whatever. Even if I did have a Micro I'd never use it because I always have my DS, and when in situations that might involve multiplayer, my GBA and a link cable.
The GBM's for people who aren't insane Nintendo fans like us and only want to play 1 or 2 GBA games occasionally. And it would make a sweet MP3 player with the Play-Yan, I want one a those! Too bad the DS would have to be open...
Ironic you should say the 15 pound pants thing, because I always wear these UFO Pants with a 40 inch leg (going around the leg) and I can fit a slim PS2 and two games in each pocket. Or the slim ps2 and 7 games using both, being that two ps2s is something that is actually pointless.
Also, the only GBC games that I still have are: Donkey Kong (one of the rarest GB games ever, I shall never sell it.), Pokemon TCG (Darn childhood: I could never sell it), and Pokemon Gold because I got every pokemon without cheating (Except the unobtainables, Mew and some other dudes).
Plus, why the frig is everyone hating on GBM. It is awesome, especially because the 20th anniversery one is for hardcore nintendo fans. And being that I have 15 pound pants, I carry my PSP, IPod, DS, Micro, Cell, and tons of games all the time.
And my reasoning for carrying both the Micro and DS at the same time?
The Gameboy Micro is:
Small
Comfortable
One Screen so you don't have the empty one
And so freakin light
