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Their first interaction was in "Shellback Shenanigans" where Plankton dressed up as Gary to get the Krabby Patty formula in Season 7. For two whole seasons, they didn't have an interaction until The SpongeBob Movie: Sponge Out of Water. Towards the end of the movie, SpongeBob gives Gary a Krabby Patty with mayo. However, SpongeBob noticed something fishy as he says that Gary hates mayo. The Gary is then revealed to be a robot that Plankton was controlling. The real Gary comes into the Krusty Krab, as he gets growls at Plankton, causing him to run away. Their next interaction was in "Pineapple Invasion," where they faced each other in fighting and beating each other after SpongeBob hid the Krabby Patty formula in his house. Plankton soon goes into Gary's shell but starts to hallucinate when the smell from Gary's shell causes it, making Plankton fail and picking up a grocery list instead.