Underpants wonderpants!

Meet underpants wonderpants, saving the day with underpants power. He swoops in with a pantachute for a queen in distress, puts out a fire with his super-pant-scoop ... But that's not the end of his super-pants day. The aliens are heading toward Earth. Can wonderpants' underpants power save the world in this laugh-out-loud rhyme to share?