There is only one way . youre Pokemon has to learn it at a certain level . there is no TM for sky attack.
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It learns it at Level 1. Yup.
You can get Shaymin in sky form only in Pokemon Platinum Version.
Spear Pillar is at the top of Mt. Coronet (Sky Pillar, where you catch Rayquaza in Pokemon Ruby, Sapphire, and Emerald, does not appear in Platinum).
Articuno is not able to learn the move Sky Attack. It can only be taught Sky Attack with the TM 43 in Pokemon Red and Blue. Sky Attack is no longer TM 46 in later games so it's impossible for Articuno to learn Sky Attack outside of Pokemon Red and Blue.
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