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Wonder Card form glitch
The Wonder Card form glitch is a natural glitch in Pokémon X and Y.
If the player moves between two Wonder Cards of the same Pokémon but a different form (e.g. Fancy Pattern and Poké Ball Pattern Vivillon), then the model will not update from the originally shown form.
The glitch will not work if either a different Pokémon or blank Wonder Card is shown in between (e.g. Fancy Pattern Vivillon, then a different species, then Poké Ball Vivillon).