In Snowpoint temple and in different Mt.Cornet's,
Registeel
Yes First, you need to have a Regirock/Registeel/Regice in your party.
Regice: mt coronet exit regirock:sand storm place registeel: iron island order: Regirock regice registeel
how do i get regirock
Regice: Route 105 Regirock: Route 111 Registeel: Route 119
u cant
Somewhere
Regirock is the weakest among them.
I think there are: groudon rayquaza latios regice registeel regirock regice, regirock, and registeel are really hard to find, so you may want to look them up
k
YES
Regirock, Registeel, and Regice.