Next to the pokemon center in Mauville
Migrate it!
Either Ruby and Sapphire remakes or Pokemon Titanium
house next to the Pokemon center
It is at next to Slateport city
wait for the next day in real life
maybe pokemon gray or the remakes of pokemon ruby and sapphire remakes
no you can receive it in the mountain next to lillycove Hope this helped =]
Underneath Pokemon's shoes, next to the stack of Pokemon's calendars you silly goof...
Regirock, and finally Registeel.
They are re-doing the Ruby and Sappire versions for the 3ds.
Find the HM (in the building next to the Pokemon centre in rustboro city) and use it in the menu