My favorite holiday is coming up, so there are plenty of ideas to choose from. Remember to read all the options to know which one you like best!
1.- Bat, posibbly by a costume or a bite
2.- Some pokemon ghost or dark type
3.- Inanimate cat in the shape of a ballon (inflatable), take more than 2 candy from the bowl and karma shall appear (TG)
4.- Mismagius (option 1), hex maniac related or a banette getting revenge just like it's dex description
5.- Mismagius Plush (option 2), hex maniac related or a banette getting revenge just like it's dex description
6.- hisuian zoroark, A person puts on a mask of a certain creature and begins TFing (TG)
7.- A banette making someone a hex maniac, then turning him into a pokemon as a further step absol or thievul (TG)
8.- A werewolf tf but is a girl turning into a midnight form of a multibreasted lycanroc
9.- Dog, Someone transforms into a dog by voodoo magic (TG)