The second time it is shown, it has an electrical plug that, when connected to the super goo bubble, it shocks anyone who is on the bubble. It looks similar to the next two forms on the list.
It is the fifth form seen in the episode. It is created when Plankton has to change from the flying mode by replacing the propeller to track wheels.
Sandy, Patrick, and SpongeBob in Sandy's submarine chase Plankton in the tank form of the vehicle until he speeds up. Then, Sandy takes her lasso and lassos up the tank and wraps the end that she is holding to a hook in front of her. Afterwards, SpongeBob, Patrick, and Sandy run to the vehicle. Plankton changes forms back to the flying form.
This is not technically the name of the form, but rather what it does, which it controls the Super Goo Bubble. It is the sixth and final different form seen in the episode.
It is created when the flying mode lands in the goo. It has a giant needle that Plankton uses to pop the super goo bubble. It also has a parachute.
Role in episode
It is used to open the crack at the bottom of Goo Lagoon to release a giant Super Goo Bubble. It is then used again to control the bubble. According to Plankton, its actual purpose is to open things as easy as a clam.
Plankton's plan is to use the bubble to threaten Mr. Krabs into giving Plankton the Krabby Patty secret formula because according to Sandy, the Super Goo is toxic and can destroy things. Plankton brings the giant bubble to the Krusty Krab and demands the formula, otherwise, he will pop the bubble.
Mr. Krabs gives up the formula, but Plankton goes against his deal with him and pops the bubble. However, the super goo does not destroy everything, but merely just covers the town and its inhabitants in the goo. The formula is just a stick of dynamite rolled in a piece of paper as a trick, and Plankton loses yet again.
The mechanical clam digger is destroyed when it hits the roof of the Chum Bucket after the dynamite goes off.