It's only a model...
Uncommon, some wear on the edges.
First game: TI Invaders (Space Invaders knock-off) for the TI-99 "home computer". Either that or the Pac-Man built into the glass-top tables at Mr. Gatti's Pizza.
First console: NES
First world-altering game secret: JUSTIN BAILEY
First Arcade: Aladdin's Palace
First "mature" game: Leisure Suit Larry
First PC: 386SX 16 mHz w/40 MB HDD, Win 3.0, & 640x480 VGA baby!
First FPS: Wolfenstein 3D
First game mastered: Street Fighter II Turbo - Hyper Fighting (SNES)
First LAN deathmatch: Duke Nukem 3D
Great Game Reawakening: Living in an apartment with all sixth generation consoles and 3 gaming rigs.
New Systems: Wii, DS.
Somehow now owns: PS3
Randomly owns: SEGA Nomad, Game Gear, Genesis II, Sega CD
Cannot afford but is thinking about intercepting return RROD coffin: Xbox 360.
Currently playing: Rock Band, Zack & Wiki, Unreal Tournament III
There's also the problem of loading games onto the cart. Perhaps you could use the Wii Shop Channel to download to an SD card, and then pop it in an adapter. But how would you keep it playable on only one DS? That would require quite a bit more -- dare I say it -- connectivity between the DS and Wii than we've seen.
Plus this info just pops out of nowhere with no attribution. Just seems... sketchy.
They could use the DS's connectivity with the Wii to send GB & GBC games directly to the DS's flash cart, which would then be encrypted to only work with that cart.
Unless they were $1 each, I can't think of too many GB games I'd even bother with honestly.