I just wasted about a half hour trying to get chinchou. Several magikarp, 4 perals, 7 big pearls, two heart scales, and two or three wishiwashi later, I finally got a chinchou. You know what I did? I said "screw you, I'm not going through this again," and I chucked the Master Ball i won from the lottery at it.
Yes, that is an anthro Trubbish. If you don't know what Trubbish is, it is a Pokémon from Gen V. It's known as the “Trash Bag Pokémon”, because it is literally animated garbage. Its Pokédex entry from Pokémon X says: