- Hard Mode Hack of Pokémon Stadium.
- Rental Pokémon have better moves/tweaks.
- All 151 Pokémon can be recorded in Hall of Fame from Rental Pokémon alone. You’ll need to reach Round 2 in order to achieve this. Only certain cups have certain Pokémon provided, so you have to visit many of them. You can still use continues in the Stadium Cups, but you cannot do so in Gym Leader Castle.
- Enemies are significantly stronger. They have better AI, Pokémon teams, moves.
- And more!