The Prime Cup makes its return from Pokémon Stadium. However, unlike in that game, in Pokémon Stadium 2 there is only one division to battle through. The Prime Cup trainers have Level 100 Pokémon and some incredibly tricky strategies, many of which involving Legendary Pokémon. There are no restrictions on Pokémon you can use within this mode.
In Round 2 of this mode, there are 3 unique Rental Pokémon only available in this mode; Surfing Pikachu, Mew and Celebi.
GameBoy Usable: Yes
Allow Same Pokémon: No
Allow Same Items: No
Sleep Clause (No more than 2 Pokémon Asleep): Yes
Freeze Clause (No more than 2 Pokémon Frozen): Yes
Self KnockOut Clause (Final Pokémon fainting at the same time as opponent equals loss): Yes
Earn a continue by defeating the opponent without losing a Pokémon