Dipper, Mabel, and Bill - Gravity Falls and Pokemon Hmmm actually I think Dipper and Mabel would choose not a type but rather a theme. Bill perhaps too but a Psychic-Dark combo sounds good for him too.
Joking a side I can understand some people thinking this. I mean if Mabel hadn’t given Billendin the Rift, then Weirdmageddon wouldn’t have happen. But if Ford had allowed Dipper to tell Mabel about the Rift then, That wouldn’t have happen. BUT MAYBE Ford