What item/ability duplicates your stats boost?

Question

In Pokemon Showdown, I was playing a Hackmons battle.
Then Latios used Shell Smash but instead of x2 it become x3.

HOW?!

Answer 1

Simple.

Source - Showdown and this.

Comments

I'm going to use dat!
Thanks c:

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Np, and remember, stat drops also double.

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Swoobat and bibarel are the only fully evolved pokemon with simple.

Here is a good moveset 4 a simple swoobat

Swoobat
Ability: simple
Nature: timid
Evs: 252 Spatk/252 speed/4spD
Item: weakness policy
Moveset
Calm mind
Reflect
Stored power
HP fighting
 This is my swoobat moveset hope you like it :)