Kwack

Kwack is a highly intelligent, superpowered duck. He appears as a minor character in the TESLA series and is the protagonist of The Noble Exploits of Kwack the Duck.

Not much is known about Kwack. He is very smart, ironically, the only thing he can say is "QUACK." However, in Teslatale, he is shown to be capable of speech. He can, unlike regular ducks, fly, hack into computer systems, pilot a spaceship, and fire death ray incineration beams from his mouth. He is very loyal to his friends and does not hesitate to put his life in danger for them.

In The Noble Exploits of Kwack the Duck, Kwack seems to be bored and pokes around until stumbling upon the Studio, the main drawing area of NCO, Inc. He then gets engaged into a battle with the Pencilly, the Publishing Gang, and the Copyright Police. Since the series was not finished, Kwack's fate is currently unknown.

Teslatale
Kwack is the boss right before Pencilly. He shows regret at Killer Tesla's genocidal spree and says he doesn't want to fight Tesla, but Tesla attacks him anyways, forcing Kwack to fight back.

Kwack reveals he had known there was no way he could battle Tesla with his regular powers because he only had 10 ATK and 10 DEF, so he went into the Dimensionporter and grabbed weapons from different universes, which include Friendliness Pellets, Gaster Blasters, and vines. Despite Kwack's new powers and ridiculous amount of HP, Tesla still kills him without remorse. However, Lyne grabs his SOUL and escapes before he truly perishes.