Brawl - How to beat the Lvl 4 and 5 target smash's in under 30 sec?!

[StarcraftManiac]

I'm trying to get all the Challenges in Brawl... So far I've collected a little over 100 out of the 128... I've run out of hammer's to use on the (almost) impossible ones... But I figure there should be a way to beat Lvl 4 and 5 target smash under 32 and 30 seconds... For that is the necessary time to clear that challenge...

If anyone of you has done this, could you please explain how, with what character and in what order of destroying the 10 targets...

 

Thanks for your help!