Hinge and inside are a slightly metallic looking onyx.
Front has grovyle from Mystery Dungeon stealing a Time Gear
Back has Pokemon game information (from left to right: Diamond/Pearl, Mystery Dungeon 2, Pokemon Ranger 1 and 2)
Holds system and 3 DS games
Slip includes password for special mission in Mystery Dungeon 2 (code: 78SR -H2m PO+4 Y6FY 1&Y+ #R9S Prize:Luxray Fang)
Thanks to Deadmen for the heads up!