help needed in Soul silver (generator piece)

i know the generator piece is in misty's gym, but ive pressed "a" in every square of the water, i already beat the rocket guy on the bridge, do i have to do anything else?

'Look in the liferings from all sides'.

Also called LIFE SAVERS... the ones on the back... red and white... circley... close to the left side of the pool...

cool thanks