N64 classics: Paper Mario SM64 OoT MM Pokémon Snap SSB SF64 DK64 BK Goldeneye Any other must plays?
Mario Kart 64, Pokemon Stadium (probably wouldn't work in this scenario), Diddy Kong Racing, Wave Race 64, Yoshi's Story, Mario Party 2/3, Perfect Dark, Mario Tennis, Kirby 64, F-Zero X
We won't see BK, Goldeneye, or Perfect Dark since they're all Rare, and possibly no DKR since it has Conker and Banjo. We'll be lucky enough to see DK64. Take out Stadium due to it's GB accessory scenario and we have 15 games. If you wanna make it an even 20, add Sin & Punishment, and maybe some third party support with Ogre Battle, Castlevania, Bomberman, and maybe even a Star Wars title.
The original Bomberman 64 or Bomberman Hero? Please say Hero.
Either 64 or Second Attack, most likely. And also, thinking about it further, Castlevania 64/LOD would miss the cut due to being M-rated. So add Mario Tennis or Golf instead ---