Iono with the Magnemites on her head, about to Terastylize. She says, "Come foooorth, shiny li'l lightbulb! I'm not done yet! Iono power, gooooooo!"

Iono and the blonde girl protagonist pose as the protagonist won the gym battle. Iono is not wearing her Magnemites.

I honestly thought the #Magnemites on #IonoPokemon 's head were part of her hair, I was surprised to learn they're just accessories.