Chase! Metal Face Counter attacks
S1:E10
1996
IMDb
X and Teppei are attacked by the B't Madonna and Metal Face. They force X and Teppei to crash into a deadly valley. It's a place where the sound of the wind can affect a B't and shatter them completely!! But, there was a man who came and helped them. He is Professor Zaji and he's wanted by the Machine Empire. To escape from the valley and rescue the Professor, X and Teppei must be united to overcome the effects of the wind! Episode summary graciously provided by Vortex Fansubs