Duster

Duster is a character that can be found at the entrance of the librarby in Nerd City.

He will also battle you at the end of chapter 3, and he has thunder based attacks, while being immune to thunder attacks himself.

His dialog and battle are filled with references from [https://en.wikipedia.org/wiki/Yu-Gi-Oh! Yu-Gi-Oh!], and he is the leader of a gang with bionic limbs, being a reference to the "Exodia, The Forbidden" cards.

All Exodia members are:

Duster (Left arm - Thunder themed)

Navia (Another left arm - Doesn't battle you)

Blaze (Both legs - Fire themed)

Amelia (Right arm - Ice themed)

Golias (The body - Earth themed)

Goiaba Meggas Xellox (The creator of the game) stated that having messed up pieces that don't allign at all would be funnier than just a right and left arm, right and left legs and a body. It's also heavily implied that Blaze plays Magic: The Gathering when fighting you instead, and that Amelia plays Hearthstone, tho other card games.

Golias is the only missable boss of the gang, and he doesn't seem to be playing anything. He just wants you dead instead.