Rain T. again, hmm? Well, okay, let's go somewhere else with this.
Your avatar's head makes me think of an orange onion for some reason. You're still quirky, and now you're combat ready... because of onion head, we'll narrow this down to a Grass-type this time. They may not do very well in the rain, but they absorb that water into their roots! So there's that. Oh, but there's a Grass-type who loves the rain! Rain Dish Ludicolo! It fits with the quirky nature too. And because it's already ready to dance, it's always probably ready to fight.