Keep That Jelly Feelin'
Your goal is to keep the Bullies away from both Spongebob and Patrick, as well as the purple buttons, until the Jellyfish has had time to collect all of the Krabby Patties.
Start with Patrick. Move the box to position 1 and wait until the Bully has reached it and turned around. Now push the box to position 2 and run up the right corridor 3 to collect Bonus Bubbles. Don't be too slow, though, as you need to get back to position 4 as quickly as possible.
Quickly switch to SpongeBob and - assuming the right Bully is on his way back up - push the box to position 1, then quickly retreat to position 5.
Switch to Patrick again. Wait for the Bully to come and go, push the box back to position 2 and run up the left corridor 6. Collect Bonus Bubbles, return to position 4. Switch to Spongebob and push the box back to position 1 (if necessary).