Whn im in the hq of team galactic,wht do i do there whn i need 2 get the pokemon tht was in the lake?

I dont completly understand ur question but if u mean free them you have to beat the boss bring electric and fighting, then go down the hall to ur right then take the portal then keep going that hall and u will see all 3 and commander saturn bring ghost, fire, and psychic for him then press the on