Original: At the Spear Pillar , Cyrus uses the Red Chain to bring the legendary Pokémon Dialga ( in Diamond ) or Palkia ( in Pearl ) out , planning to use their power to distort spacetime and so create the new universe , over which he will be the new deity ( or so he thinks ) .
Simplified: At the Spear Pillar , Cyrus uses the Red Chain to bring the legendary Pokémon Dialga ( in Diamond ) or Palkia ( in Pearl ) out , planning to use their power to create the new universe , over which he will be the new leader .