Disambiguate Krabby (the Pokemon, Not the Artist)

BUR #15523 has been approved by @evazion.

rename krabby -> krabby_(pokemon)

As the title said. We already have an artist with that name, so the Pokemon need one too.

The bulk update request #15523 (forum #234942) has been approved by @evazion.

The majority of Pokemon creatures aren't qualified, and I'm not sure we want to start given that there's always the possibility that some random artist will have the same name as some Pokemon.

That was essentially my reasoning, but I forgot to reply in this thread about it. I don't like that this BUR was approved.