For the frenemies achievement I used captian planet for the first half of the fight using his forward sig attack then switched to Ben 10 for the second half of the fight. I found it much easier doing that. Hope that helps. I also unlocked the achievement like a hoss using only captian planet but I did have Hoss Delgado in my party. Not sure if it's a glitch or what.
Last edited by damiennn; 12-21-2011 at 03:01 AM.