Hi I'm a beginner breeder and no one at my local daycare can answer my question. Which Pokémon suffer most from inbreeding? I've heard a lot about the region's starters being the most inbred but here in Hoenn that doesn't seem like much of a problem especially with Treekos.
Starters, Eevee, Pikachu, some dragon-types, and “fad” Pokémon. Fad Pokémon are ones that become really popular after a movie, book, or television show features one. Unfortunately, when a lot of people want the same Pokémon at the same time, a lot of breeders will “cut corners” and unhealthy babies result. Zigzagoon and Phantump, for example, have it rough this year because of that comic book movie that came out during spring break. It can take years to get a “fadded” Pokémon’s bloodlines back in check.