How do you defeat Frigisaurus in Fossil Fighters

the first time you fight frigisaurus in fossil fighters, it's impossible to beat so don't get mad. after you lose you go back to the fossil center and talk to dr. diggens. you go through a series of events until you finally dig up the ignosaurous fossil in mt. lavaflow. with ignosaurus on you team, you are now able to beat the frigisaurus.