User blog comment:Jared Grace/I have found the cheats to unlock the characters in Ultraman Fighting Evolution 3/@comment-220.255.2.79-20121215092746/@comment-6524010-20130325103448

As far as I remember, you must finish the battle quickly, since every 30 seconds the rectangles will decrease one by one. The solution about it is just equip an Ultra with one Special Move (best choice is with S Rank, since they instant K.O opponent). And the easy way is to use Ultraman Legend :P.