How can I change Keldeo's form?

Question

Just got my Keldeo but it wont let me change his form to resolute.

Answer 1

Go behind Alder's House and interact with the Rock in Pledge Grove.
With Keldeo in your party.

Comments

I have done that but nothing will happen.

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Then your Keldeo is a hacked Keldeo. It will only happen with Event Keldeos.

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Ok. Thank you Mew.

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Don't forget Keldeo has to have Secret Sword ;)

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It doesn't have to. It can learn it upon interaction.