When it starts to spin and spit flame around ONE of the bros., you should watch the wings. If it rises its wings then it spins slowly, but if it pulls the wings inside it, it spins faster. Then it starts to be dizzy and go towards the other bro. Jump on it to do some damage. It has an other attack, when using it, it moves to North or South and tries to damage the both bros. However, it does not get dizzy, so you cannot counter-attack it.