What is the move that most Pokemon can learn?

Question

I believe it's Protect, not sure though.

Answer 1

Nope it is Hidden power. Source: http://bulbapedia.bulbagarden.net/wiki/Hidden_Power_(move)

Comments

I thought ALL Pokemon were able to learn Protect! :o
(Except of course Ditto)

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Not Regigigas.

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Magikarp XD