User blog comment:Energy X/Pokémon: Orange and Purple/@comment-26530425-20160808203540/@comment-13431011-20160808221231

"I think that it might be because of the Pokemon you might be able to find there."

Jeremy walked towards the group.

"There have been many reports of Pokemon in that forest that know moves they cannot normally learn. Known reports are Tangela knowing Double Edge and Fletchling having the move Quiver Dance. However, they're probably trying to find the unusual and rare Oddish who knows Leaf Tornado. This isn't even learned by it's evolutions."