Question

Is Rowlet more effective in Pokémon Sun or Pokémon Ultra Sun?

Comments

According to Smogon's in-game tier threads, Rowlett's performance is about the same in both games.

Answer 1

Actually, Rowlets of both the games have similar states, moves etc. There are no confirmed differences or substantial effectiveness. The only difference you could see, if you have Rowlet of different nature in Sun and Ultra Sun.

Comments

I think you’re missing the point. The two games do end up going in reasonably different directions: in which of them does Rowlet perform better?