Which Regi Should I Get?

[The name master]

I'm playing pokemon ruby and my team is:

Swampert, Aggron, Gardevoir, Altaria and Zangoose. Should I get Regirock, Regice or Registeel?

[MegaNerd14]

if you really want a legendary so bad, i say that regice is the best option to support this team. it's found in the island cave on route 105. to solve the puzzle, talk to the back wall and sit for 2 minutes. i still would have preferred something like banette though :/