>>56115452nah, Brassius made your job easier on the east side of the map beforehand as they're closer in terms of levels and the him being a lvl farm thanks being a Grass type with the early game full of Bug, Flying and Fire types. Kofu on the other hand has a 15 level gap compared to Katy, and the route mons won't help it either: with most of them being either weak to Water, Fighting or are too frail to survive Crabominable or even Veluza's attacks.
although people using mostly special attackers or slower mons with low special defense might have some trouble against Iono's Mismagius.