Pokémon Stadium 2 didn't change the formula much from its predecessor, Pokémon Stadium, but it did add support for the newest Game Boy™ Color games, Pokémon™ Gold Version and Pokémon™ Silver Version (with support from the N64 Transfer Pak).
Pokémon returns to the big stage in Pokémon Stadium 2 for N64. Grander animations and more amazing Pokémon make Pokémon Stadium 2 your place to battle. Expand your roster by transferring in Pokémon caught in Pokémon Gold and Pokémon Silver.
When it's time to take a break from battle, start up one of the many Pokémon-themed minigames. And, expanding on the scope of the first Pokémon Stadium game, you can now play Pokémon Red, Pokémon Blue, Pokémon Yellow, Pokémon Gold, or Pokémon Silver through your N64.