Level 20:
If you want Hitmonchan, it's defense must be higher than it's attack.
If you want Hitmonlee (Vise versa).
If you want Hitmontop, it's attack and defense must be at the same level.
I have Hitmonlee and Hitmonchan on my Pearl version, but I still can't get a Tyrogue's attack and defense equal... hard!
Chat with our AI personalities
Tyrogue evolves at Level 20. If its Attack stat is higher than its Defense stat, it'll evolve into Hitmonlee. If the Defense stat is higher than the Attack stat, it'll evolve into Hitmonchan. If the stats are equal, Tyrogue will evolve into a Hitmontop.
At level 20 when attack and defense are equal
A Tyrogue will evolve at Level 20. If its Attack stat is stronger than its Defense stat, it will evolve into a Hitmonlee. If its Attack stat is weaker than its Defense stat, it will evolve into a Hitmonchan. If its Attack stat equals its Defense stat, it will evolve into a Hitmontop.
Level 20, and defense higher then offence
It evolves at level 20 if the Attack and Defense stats are the same.