>>33548421depends entirely on the game youre playing and what mons you use. what tends to be the problem in using monotypes is coverage and that every mon has the same coverage. leading to some battles you ust spam 1 mon and the rest get weaker.
from my experience tough ice, normal and dragon are the hardest. ice alone makes for a bad typing aside from offensives and theyre mostly frail as shit if youre up vs a fighting type/rock type gym who tends to come early. Normal lacks coverage early on because its mostly normal/fight/dark moves all over.
and dragon because theyre usually pretty weak and rare in the beginning, and to make matters worse some even evolve after youre done with the league level wise