The robots in Denjin can enter the invincible state by charging forward AB+AB, but there are limitations. After the robot becomes invincible in the electric essence, it cannot use any other attack method (including the A button), otherwise the invincible state will be released immediately. If you want to be continuously invincible, you have to stay out of the big seat. However, in actual combat, various skills are interspersed, and the level can be cleared in one life.