I found this pretty convienient move in Super Mario Galaxy, but it's pretty tricky to pull of if you're a beginner of using the ground pound.
jump up, spin and in the VERY middle of the spin, press Z and tilt the diretion you want and SLAM!!!!!
Dude from another forum. I haven't tried this yet. What does he mean by "SLAM!!!!"?
Ok I just tried this - its real!
Just follow what that guy said and you'll go higher while jumping for the Ground Pound, and you'll land in a cool fashion. And yes, it does indeed home in the direction of enemies (I tried it only against a koopa). Also it can break large numbers of Ground Pound blocks in ONE hit.
EDIT: I found what its called.
Originally Posted by Guffawe
Triple-Flip Gargantuan Ground Pound: This one is one of my favorites. To do this, just jump in the air and spin but before you finish spinning in mid-air, do a ground pound and whoever your using will do a triple flip while bobbing left and right and land with their hands in the air and a massive ground pound. Pretty cool trick.