I have:
GBA:
Megaman & Bass
Megaman Zero
Gamecube:
Megaman Network Transmission
Zoocube
XBox:
Dino Crisis 3
PS2:
Mobile Suit Gundam: Federation vs. Zeon
UPDATE: Added a few more...
Right now my top wants are:
I'd be willing to trade 2-3 of the above games plus cash for any game below marked with an ** .
XBox:
Buffy the Vampire Slayer
Dead or Alive 3
Panzer Dragoon Orta**
PS2:
Disgea**
Ephemeral Phantasia**
Guilty Gear X**
Guilty Gear X2**
Gamecube:
Ikaruga
Mario Party 4
Pikmin
GBA:
Phantasy Star Collection
Super Ghouls 'n' Ghosts