Question

Why is Cosplay Pikachu shiny-locked?

Comments

It's probably because the graphics people were too lazy to make shiny sprites for every form of Pikachu.

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Haha true! (12 Characters)

Answer 1

It's been almost an entire month and nobody has answered this, so I guess that I will.
I'm assuming that Cosplay Pikachu is shiny locked because GameFreak/the Pokemon Company wanted it to be shiny locked. Other than that, I don't think there'd be any other reason that it's shiny locked.