How does this work for them, but not me?

Question

I was battling on smogon and came across someone using Aron. It had sturdy and they would use endeavor and regain hp, but when I try it doesn't work. Why not?

Comments

How much HP did he gain back?

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feARON!

Its a set that you only need a Aron.

Aron-Shell Bell
Nature:Any
Evs: Any
Ability: Sturdy
Moves: Endenvor, Protect, Rock Smash/Stealth Rocks, Iron Head

Ghost types are a counter against this set.

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Justin Flynn's video can teach you better :P

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https://www.youtube.com/watch?v=KF6vJpWHxoU

Answer 1

He used Shell Bell maybe.
He also uses Tyranitar with Sand Stream.

Here is a video of maybe what happend to you :
http://www.youtube.com/watch?v=oJxvmtCwAZY

If is not, sorry :c

Comments

Also remeber Sturdy only works when your HP is Max HP!

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Definitly Shell Bell