Collecting the crystal from the water shrine

I forgot if there is a way to do it.

could someone tell me how to get to that barred off crystal please?

thanks :3

(SPOILER) Head down in the submarine in world 3 and prepare to face off against GOGO

wooh!

okay. I dont recall ever doing that, but okay!

:3

*goes to Karnak before facing Summon thingy that shoots ice*

Also:

(SPOILER)Make sure to get Shiva from the top of the castle tower as well, as you won't be able to do that after hitting world 3.