Lagging Tail

A Lagging Tail is a held item that causes the holder to move last within moves of the same priority. It can be obtained as a tier 2 special drop. It is also a drop from certain wild Pokémon.

Pokémon drops

Pokémon	Chance	Quantity
Aggron	5%	1
Onix	50%	1
Steelix	50%	1