Pokémon Silver

Pokémon Silver's Extreme Randomizer applies maximum chaos to the full 251-Pokémon Gen 2 pool — typings, evolutions, moves, and all encounters are randomized. Silver's version-exclusive lineup is irrelevant in extreme mode since typings get reassigned to anything. Two full regions of extreme-randomized content plus the Battle Tower makes for a long, unpredictable run.

Silver's Lugia late-game encounter is extreme-randomized — its typing and moveset are completely unknown, so the climactic legendary moment is a genuine surprise. The Battle Tower's post-game opponents bring their best extreme-randomized teams, extending the chaos past the Elite Four.