Nowhere.
in chroma ruin
that Pokemon is not in Pokemon ranger, Pokemon ranger shadows of almia, or Pokemon ranger guardian signs
you don't catch it
do quests and catch legendary Pokemon to get signs
Get it from the downloadable missions from the past
in the daybreak ruins in a buch
Regirock is at the Sekra Mountain Range. Regice is in Panula Cave. Registeel is in the Krokka Tunnel.
Go to Mt. Sorbet and he should be somewhere in there
no you can not
Lugia. to acess it you need to catch the 300 other pokemon to catch. then a special mission to unlock it will be available. Enjoy!
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.
i don't now but i hope