My favorite Pokémon is Skuntank, so of course it's my favorite poison type Pokémon. I saw this fan artwork of this skunk Pokémon online and then it quickly became my favorite Pokémon. I used it a lot in various Pokémon games since. Its most interesting move is Flamethrower, it's impressive to learn a fire type move like that. I like how it's a skunk Pokémon with a tail that can shoot out poisonous projectiles, flames, and skunk spray like a real tank.
Its face looks kinda like a cat, which may be related to the fact that skunks are sometimes called polecats. But its facial cheeks are tan and looks like a pair of buttocks, it somehow also has a butt chin, and also when you look at it from below, it still looks like a butt. Pretty cool.
It also got a cool card that shows a Skuntank den. https://m.archives.bulbagarden.net/media/upload/a/a7/SkuntankVSilverTempest181.jpg
Unfortunately it hasn't appeared much in the anime series - I wish a protagonist had a Skuntank as a major party member. It would be cool to see.
Ever since I got spoiled on grafaiai, it instantly became my favorite poison type. The gen 9 mons can be hit or miss for me, but I just absolutely adore grafaiai for the design, despite not liking the shiny.