Charizard, Charmeleon, and Charmander were redesigned with haunting features, drawing inspiration from ... with Mega Charizard and Gigantamax Charizard among the more noticeable ones.
Pokemon GO players celebrated the feature's launch by battling Gigantamax versions of Charizard, Venusaur, and Blastoise, and then got spooky with a Halloween event featuring Gigantamax Gengar.