Yeah, there's the problem that Centiskorch is flaming and Momoyo doesn't really have association with the fire element.
But if Momoyo was a pokemon I think she'd be a Bug/Ground, due to all that digging.
She also have Dragon element within her (the Ookumade is said to have dragon feature) so Bug/Dragon with “Poison move dealing more damage” as her skill would also be good.
Edit: That or “dealing super effective damage against Dragon type” skill called Dragon Eater, and have her be Bug/Ground again
Wait, judging by that shape, are you a girl??Well hey, then you're the same as me.