In this timeline, Anthro Pokémon are very common, so they're not something rare at all. Regardless, now we head onto our story...

You’re adventuring through the fabled Cerulean Cave after becoming a prestigious trainer. You get to the deepest part of it, and see a strange figure standing high.

"You shouldn't be here..."

A telepathic voice spoke to your head, as some psychic force moved the waters away so you could walk to a remote place where this figure stood.