I have a team of all legendary Pokémon. I have a Diancie with Diancite, Mew with Mewnium Z, Mewtwo with Mewtwonite X, Melloetta with nothing, Keldeo with Waterium Z, and Yveltal with Darknium Z. I do not understand why it won’t let me battle, I even selected Special Allowed.
Pleaselog inorregisterto add a comment.
You didn’t respond to the clarifying questions, so I’ll have to answer based on my best guess.
Mythical Pokémon are considered to be special Pokémon in some, butnot all, contexts.
sourceSo “special allowed” might have banned Mew, Keldeo, Meloetta, and Diancie. It might also have banned Mewtwo, because mega Mewtwo X is physical and not special.