Leviathan

The Leviathan is a secret pet in Bubble Gum Simulator. It was obtained from the Frost Egg on the Festive Island while the Christmas 2018 Event was active. It has a 1 in 8 million chance (0.0000125%), or 1 in 4 million chances (0.0000250%) with the Lucky Chances gamepass.

Trivia

 * As of update 9, the leviathan is now the 2nd most powerful pet. Most powerful pet being Dogcat.
 * The Leviathan has the lowest chance of being hatched from an egg, making it the rarest pet in Bubble Gum Simulator.
 * This pet was hinted in one of Isaac's tweet.
 * This pet's stats are almost double the overlord's stats, which was the best pet in the game before the Leviathan was released.
 * This pet is the biggest pet, being 4x the size of other pets.
 * This was the first secret pet hidden in an event egg.
 * This was the second secret pet in the whole game.