>>13492088I doubt it would help his popularity in the slightest.
It may as well be the same case as is with Samurott in the eyes of its haters: "It would look so much better if it wasn't lying on its belly like a... a... sea lion!" - that is, an unsettling quirk that draws attention of those who already have no ounce of sympathy for a pokemon.
If anything, removing Gallade's arse would only improve his rating in the eyes of haters from "I hate him so much" to "I have no opinion of him".