The Super Hexarium is a Legendary pet in Bubble Gum Simulator. It could have been obtained by opening a Mutant Egg. The chance of hatching it was 0.001% (1 in 100,000), or 0.002% (1 in 50,000) with the Lucky Chancesgamepass.
Trivia
This pet currently wears its hats too low, and many of them can't be seen due to being hidden in its body.