Level it up to Lvl 40.
Yes.
Whismur will evolve into Loudred at Level 20, and Loudred will evolve into Exploud at level 40
Loudred evolves at lv.40
no hitmonlee does not evolve
Dunsparce does not evolve.
You evolve a whismur.
No.
You can't evolve magneton in soul silver. You can only evolve it by trading it back to Diamond or Pearl and training it at Mt. Coronet.
Luvdisc does not evolve from, or into anything.
Loudred evolves into Exploud at level 40.
Actually....Shuckle doesn't evolve at all
Whismur can evolve starting at level 20 into Loudred. Starting at level 40 Loudred can evolve into Exploud the last evolution of Whismur.