Pokémon Diamond and Pearl/Team Galactic Headquarters

Information was taken from Bulbapedia, the community-driven Pokémon encyclopedia.

The Team Galactic HQ (Japanese: ギンガだんアジト Team Galactic Hideout) is one of the main centers for Team Galactic's operations. It housed the legendary Pokémon Uxie, Azelf, and Mesprit for a brief time.

Trainers

 * Galactic Grunt:
 * Golbat L 37


 * Galactic Grunt
 * Dustox L35,
 * Bronzor L35


 * Galactic Grunt:
 * Glameow L37


 * Galactic Grunt:
 * Wurmple L32,
 * Cascoon L34,
 * Dustox L36


 * Scientist:
 * Kadabra L35
 * Kadabra L35


 * Galactic Grunt:
 * Stunky L37


 * Galactic Grunt:
 * Bronzor L36,
 * Stunky L36

Galactic Grunt:
 * Golbat L36
 * Golbat L36


 * Galactic Grunt:
 * Golbat L36,
 * Silcoon L34


 * Scientist:
 * Kadabra L35,
 * Kadabra L35


 * Galactic Grunt (double battle):
 * Stunky L36,
 * Croagunk L36


 * Galactic Grunt (double battle):
 * Croagunk L35,
 * Stunky L35,
 * Glameow L35

After all these you battle Galactic Boss Cyrus. Beat him and he gives Master Ball they stop their plans. Follow his instructions and walk to a lab, press a button to transfer the captured legendaries back to their lakes.

Items
Elixir

Master Ball

Max Revive

TM49 (Snatch)

TM36 (Sludge Bomb)

TM21 (Frustration)

Zinc