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Dedene is a goddamned mouse; fuck you.
The Syrian hamster could work as a bulky physical attacking Ground/Dark type; I know from experience that those fuckers are goddamned invincible and strong to the point of being unreal for their size. It also wouldn't be fairy type because Syrian hamsters are cannibalistic cunts who will leer you in two.
The Dwarf hamster could work as a route one derp or even just go full Dugtrio and be a colony of tiny little Dwarf hamsters. It'd be fairly frail, quick, and hit decently. I'm thinking a Ground/Fairy or Normal/Fairy type.
The Syrian Hamster would eat the Dwarf Hamster colony with it's ability to eat meat; then climb a fucking wall and bite a cat on it's fucking nose.