Season 1, Episode 13 : I Was a Teenage Gary

SpongeBob trusts Squidward to take good care of Gary while he goes to a jellyfish convention. However, Squidward just abandons Gary and the poor snail starts to starve. Thinking Gary is going to die, Squidward rushes into SpongeBob's house tries to make the poor snail eat six days' worth of food. SpongeBob calls the veterinarian, who gives him a syringe contaning snail plasma. The plasma somehow gets into SpongeBob's nose. SpongeBob then turns into a snail and causes chaos at Squidward's house.

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