Ben 10: Alien Force Hints

Trouble deafeating Gorvan (the four arm guy) Heres some tips:
ONLY use Echo Echo.
Go to previous levels and upgrade echo echo to have the attack where he jumps onto himslf (with his copies) and creates a hammer. (3rd atack from the bottom on upgrades list)
Keep using this attack when Gorvan spins.
Since echo echo is small, Gorvan misses him whilst he shoots!