The Battle Tower in Crystal forgives nothing: seven battles in a row against trainers whose Pokémon are exactly your level. No overleveling is possible here: only team composition and how you play count.

This guide helps you choose your level category, build a team of three Pokémon that covers most threats, and exploit the habits of the opposing artificial intelligence.

All recommendations are based on Pokémon available in Crystal, without major legendaries (banned from the Tower).