Yes,you can recruit heatran in giant vulcano
Yes you can from wondermail.
you can not recruit mew but you can recruit mewtwo cya later
Nope
Yes
You can recruit legendaries and do more things.
sadly no you can't also you cannot get shaymin
You have to complete the game, and then recruit it.
You can recruit legendaries and do more things.
yes, you can recruit it. you don't need any cheats at all, at least i didn't.
2
final maze f35 find a slumber orb
in the second cave