Boota

Pig Mole Boota
Simon's pig mole pet, Boota. For the majority of the series, Boota sticks around Simon and does very little. Once Boota saved Simon and Kamina by willing removing its rear end (which later grew back) as food for Kamina and Simon, revealing they can't pilot when hungry.

Evolved Boota
While in the Space-Time Labyrinth, Boota assumed a human form due to him absorbing remnants of Simon's spiral energy throughout the course of the series. While in this state, he was able to defeat the fake Anti-Spiral in one hit. Since he was now intelligent, he realized he was trapped in the labyrinth like everyone else and that this form was caused by him being in the Labyrinth.