How do you change a Pokemon's ability through Dream World?

Question

I sent a Kyurem before to Dream World and it didn't change its ability or anything.
How exactly do you do so, if most Pokemon have a Dream World ability?

Comments

Kyurem has no hidden ability anyway

Answer 1

You have to find them in the island of dreams

Comments

Ohhh, so you only MEET Pokemon with the special abilities, but don't change them through putting them to sleep?

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Exactly. I also was very disappointed when knowing this