The Giant Super Goo bubble is a purple, sticky, and semi-solid malleable bubble made of super goo. It seems to be very light since Plankton's device is able to push it easily.
Role in episode
It is created accidentally when Plankton, using his mechanical clam digger, opens a small crack that is releasing small super goo bubbles. The super goo rises to the surface and creates the super goo bubble. Sandy thinks that super goo is toxic and will destroy everything, so she, SpongeBob, and Patrick run after the bubble. Eventually, they reach the Krusty Krab, where Plankton explains his final plan.
The bubble is used as a threat by Plankton to Mr. Krabs to give Plankton the Krabby Patty secret formula. SpongeBob tries to stop the bubble by using a bottle of Jumbo Bubble Fun - a giant bottle of bubble soap that comes with a giant bubble blower - to create a bubble giant.
The giant is destroyed when Patrick gets in its way and it steps on him, which creates a hole. It flies away, but comes back and lifts the bubble away. However, the giant is slowly destroyed when the bubble goes up into the air. The bubble bounces off the moon and comes back to Bikini Bottom. Mr. Krabs forks over the secret formula, but Plankton still uses the clam digger to pop the super goo bubble, ultimately culminating in heaps of super goo landing all over everyone.
The secret formula turns out to be a dud, and the bubble giant from earlier cleans off all of the Bikini Bottomites.
The giant super goo bubble is also home to a character created by Patrick after he got stuck in the goo: SpongeBlob.