This happened to me on the golem level in the Wii version I was in the area where volteer blasts open the door electricuting the enemies. I was fighting enemies as cynder then all of a sudden she couldn't use melee attacks of breath attacks anymore. >.< it stayed that way for the rest of the level too.... wii version has more *annoying* glitches than the ps2 version. another 1 while in the valley of avalar sometimes the dragon i am using becomes unable to move unless i jump then they move only like when you perform an evasion roll in the air.
I've had this glitch... Turn on you second controler then turn it off... If the game thinks someone is playing as Cynder then it will allow her to use melee and breath attacks then when you turn off your second controler it goes back to normal...