Arctovish

Talking of Pokémon that look like the living embodiment of a desperate plea to be put down, there’s Arctovish!
“Though it’s able to capture prey by freezing its surroundings, it has trouble eating the prey afterward because its mouth is on top of its head.”
It looks like a whale and oyster crawled into Jeff Goldblum’s teleporters at the same time, and this writhing beast of anguish crawled out, screaming from the top of its head to be put out of its misery.
Fortunately, perhaps, its own mutant form took care of that.
“The skin on its face is impervious to attack, but breathing difficulties made this Pokémon go extinct anyway.”