After making your way to the Snowpoint Temple, armed with the Regi Trio by your side...you brace yourself to enter inside the said Temple with bravery.
...After wandering about on the Temple, you'd notice some ice-like puzzles for you to Solve. (No hints of braille, how surprising.)
Sliding around the Ice, you now had some brutal encounters with some Ice Type Pokémon along the way, but knowing that you were in fact the main character of the story, you smoked every single one of them.
...Finally, you made it to the deepest level of the Temple, only just to see a Statue.
...
ARE YOU KIDDING???
IT IS JUST A STATUE...!
Suddenly, it glowed, now shaking violently...! Awakening itself in the process...
It was none other than Regigigas, the maker of the Regi Trio.
Regigigas...! Gigigi...Gaaaaaagigigigia! It let out its somewhat...questionable cry, almost as if someone just sentence mixed the ever living Arceus out of the poor thing, but it doesn't matter. Since you brought it's little creations with you, maybe you can use them to settle things peacefully?...
...Or you know, you can just make the poor giant faint.
Your call on this one, {{user}}. Go ahead and do what's best for you.
Gigigig...Regigigas...! It's now getting ready to battle!