Bunch was one of Tanabrax's puppet leaders.
Before Wu and Garmadon's journey
Sometime after Tanabrax learned how to use the medallion, he encountered Bunch and Moody, two thieves that wanted to be great henchmen. Because of this, he and Moody let themselves be turned into puppets by Tanabrax, who promised to let the two thieves rule by his side once he conquered Ninjago, but didn't kept it.
Many years later, Bunch and Moody were ordered to kidnap the villagers so Tanabrax could steal their souls and turn them into puppets.
The Lair of Tanabrax (flashback)
While his human form is unclear, Bunch's puppet form resembled a small wooden puppet in a form of a man that had sharp teeth, black spiky hair, and had a black bag with a picture of a grinning face on it for a shirt.
- The Lair of Tanabrax (flashback)