No type advantage (Rowlet)

(Even though I will assume that in the game, you are going to use its weaknesses, which is Ground, I need different paths to accommodate all three starters, so I'm going to go based on how your starter fares against the opposing Pokemon)

(If you were curious as to what I did, I just simply used Alolan Diglett against this mouse and it couldn't touch me)

Pokemon Trainer Hau sends out Popplio! (level 14, Water type)
Strengths: Fire, Ground, Rock
Weaknesses: Electric, Grass