What's odd is that the games do allow you to use Z-move twice thanks to Rotom power.
Though I guess the staff either didn't know it or if they did get the memo, they couldn't think of a way to pull it off so they went with the legendary power instead
I mean, when you think about it, Ash having access to the Z-Rotom Power would basically mean he'd be cheating, so I can understand why they'd ignore it.
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