LogFAQs > #969153232

Roark was hard? We literally get 2 out of 3 Pokemon as starters that can solo the whole fight

Also IIRC Ruby/Sapphire Watson was significantly easier than Emerald Watson

Brock should probably be within the same sphere as Roark, both in the middle of the line or lower. Brock is particularly difficult without grinding if you started with Charmander, unless of course you're experienced as know that Mankey spawns early in the game. In Yellow version, Brock is especially difficult, and Mankey is nearly the only way where you're beating him without a team full of either higher lvl or multiple Pokemon of equal or higher lvls.

Of course he's an easy sweep if you ever use Squirtle or Bulbasaur

Other gym leaders are hard to measure because your teams are usually too good as Pokemon as a whole is poorly balanced.