The Nintendo 64 Transfer Pak does not let you play Game Boy / Game Boy Color games on the N64. It is a data-transfer accessory only.
| N64 Game | GB/GBC Game | Feature |
|---|---|---|
| Pokémon Stadium | Red/Blue/Yellow | Battle with your Game Boy team on TV; unlock Doduo/Dodrio Game Boy Tower modes. |
| Pokémon Stadium 2 | Gold/Silver/Crystal | Same + Johto Pokémon, GB Tower (play GB game on TV via emulator—only in Stadium 2). |
| Mario Golf | Mario Golf (GBC) | Transfer custom golfer, stats, courses. |
| Mario Tennis | Mario Tennis (GBC) | Transfer character, unlock courts. |
| Perfect Dark | Perfect Dark (GBC) | Unlock weapons/cheats in N64 version. |
| Mickey's Speedway USA | Mickey's Racing Adventure | Unlock characters/tracks. |
The Transfer Pak is a save-data bridge, not a player.