To start, head down the street and talk to Bubble Buddy, who'll teach you how to use the Bubble-Bowl move you unlocked at the Poseidome, which destroys most Tikis and Robots.

How does SpongeBob learn the cruise bubble?

The Cruise Bubble ability is obtained after defeating the Robot Patrick boss. After the fight, you'll see Bubble Buddy standing by the road. Speak to him and he'll teach you how to use it.

How do you get the bubble bowl in SpongeBob?

You simply press the button he shows you (LT/L2) and you'll take control of a Bubble Rocket. Aim the Bubble Rocket towards your goals and it will burst into a soapy explosion. There aren't any more moves for Spongebob to unlock after that, so once you've got your hands on the Cruise Bubble you're all powered up!