Registeel is not catch able in Pokemon LeafGreen. In order to get a Registeel you will need to trade for one from Pokemon Ruby or Sapphire.
You can only get registeel in ruby and sapphire and emerald.
Only ruby, sapphire and emerald can catch registeel trade one from those games to leafgreen.
you cant
You cannot catch Registeel in Pokemon LeafGreen. This is due to FireRed and LeafGreen being able to trade with Ruby and Sapphire. Pokemon Ruby and Sapphire have the three legendary golem Pokemon including Registeel.
Trade it from ruby, sapphire or emerald.
leaf green is 1st gen and registeel is in 3rd gen sooo, in leaf green, it doesnt know what the regies are!
get the regis all of them then transfer them to your game then registeel will have the key you do know the person is sped
Regirock, Regice, and Registeel (and for that matter, Regigigas) are unobtainable in Fire Red and Leaf Green.
You can migrate it from Ruby/Sapphire/Emerald. migrate it onto platinum from leafgreen firered ruby emerald or Sapphire or use the cheat. signed:pokemonexpert
you cant dipwad. registeel is generation IV. leaf green and firered are set in generation 1. Likewise, you cant get generation II either such as Marill or Umbreon
Registeel
You cant get it anywhere in the game. If you want it, u should be playing Pokemon on the comp. and u gonna have to use the gameshark cheat. I think u can get it if u are playing on the gameboy but I dunno how?