Great for if your making your trophy collection bigger like me hehe.. check out stampsyne's Snow Wars guide here on PPT
http://www.pinkpt.com/snowwars_sub1.htm. I just did and used the 'grid' strategy and got to opponent 7 Roboball without dying once! Also got me the bronze trophy =)
Anyway just thought id point this out incase some of you didn't know it existed cos i think its great