Dialga, the legendary Pokemon of space and time, was attacked by Team Galactic at its home in Mt. Cornet. It battled the Team Galactic commanders Jupiter, Mars, and Saturn but was overwhelmed by their boss Cyrus. Dialga called for help from Azelf and Deoxsis and together the three legendary Pokemon defeated Cyrus and sent him fleeing to a Pokemon center in Hearthome City. Years later when Dialga heard Azelf's home explode, it realized Team Galactic was attacking again and defeated them once more to save Azelf.