Prof. Plankton's Mind Control Shampoo is a shampoo invented by Plankton that only appears in the episode "Mermaid Man vs. SpongeBob."
It comes in a light green bottle that reads the product's name in dark neon-blue text and has a picture of Plankton on it. It has conditioner, as Plankton points out.
Role in episode
Plankton uses this shampoo to control Mermaid Man and Barnacle Boy. He visits them at Shady Shoals Rest Home, pretending to be selling dandruff shampoo.
After applying the shampoo, he reveals the shampoo's real use and brings Mermaid Man and Barnacle Boy to the Krusty Krab to ruin its business.
- When Plankton uses this product on Mermaid Man and Barnacle Boy, he falsely lists the name as "Professor Plankton's Dandruff Control Shampoo."