Let's do a sort round (because I want to continue the holiday theme but also want to do other ones). The ones you can choose from are
exasperating whether it be the ridiculous designs and puns that make you facepalm, or because they're super annoying to run into in the wild or on someone else's team.
charitable 'tis the season for giving, right?
pitiful some 'mons you just have to feel sorry for, for multiple reasons
jolly ho ho ho
dark because the winter solstice is part of winter too. Plus there's all the fun, rather disturbing pokemon entries that make you wonder that it's a kid's game. Besides, every Santa Claus needs their Krampus, right? (He's still not nearly as creepy as the elf on the shelf, if you've heard of that. So glad my parents never did that.)
grateful I'm curious what someone would do with this, but mainly just wanted to include some non-christmas related holiday adjectives