Katamari Damacy (PS2) Kirby Canvas Curse (DS) Anything made by Atlas or Nippon Ichi X-Men Legends II for GC because that's the system my save's on Final Fantasy Tactics (PS1) back when I still saw PS1 games being sold PS1 memory cards that are official and actually work with a PS2
Okay so the last one wasn't a game, and those others are ones that I want and can't find. Share your stories of games that sold three copies out of the five that were shipped. Or rare games you have, guess that works too.
Edit: add Skies of Arcadia Legends (GC) to the list. That's nowhere to be found either.
Seriously, that game was the ONLY educational game EVER that was actually fun. 