Headscratchers / The SpongeBob Movie: Sponge on the Run

• Why didn't SpongeBob called any of his friends to join his quest of rescuing Gary?

• Plankton finally had the secret formula of the Krabby Patty and then he just gives up because he feels empty. I'm sorry, that doesn't sound like Plankton. He should be ruling all Bikini Bottom right now, but in here, he chooses to help SpongeBob's friends... Why?
  • He even did it in the first film!