Who is regragigus?

Answer 1

Regigigas is a Pokemon on Diamond, Peral, and the upcoming Platinum.

The smart thing to do to get it is get a National Pokedex and obtain Regice,Regirock, and Registeel.And have a trusty Masterball(if you've saved it).

Then go to Snowpoint Temple, and go to the bottom. A "statue" of Regigigas is there.

If you obtained all 3 Regies, then click on him, and it will shake, and Regigigas will battle you.

regigigas is the Pokemon in d/p that you catch after transferring the other three regis over