Hiku said: So what's up with those black things on the pokemon's on the cover? |
Not sure if its been factually stated yet. But some are saying its a fusion of some sort with an UltraBeast (which is and isn't a Pokemon) by the name of Necrozma. Due to similarities in design as well as that rainbow like thing (eye?)
https://bulbapedia.bulbagarden.net/wiki/Necrozma_(Pok%C3%A9mon)