User blog comment:MarvelDCandFantasyFanBoy12/The Thing Returns/@comment-3004323-20201006164849/@comment-24839525-20201006165827

Growgan and Billy:

Character: Dr. Dentisst (voiced by Mark Hamill) - a monster who is disguised as a dentist and likes to do experiments on people.

Episode: Why I Hate the Dentist - Growgan figures out the one thing Billy is scared of, as he learns it is the dentist and something is off about him.

Girl:

Character: Barky (voiced by Jeff Bergman) - a fictional menacing dog who is Bonker's arch enemy.

Episode: Trapped - Ted and Stella wake up trapped inside of Bonker's world as they try to escape.

Igor:

Character: Sira (voiced by Tia Carterra) -  a siren who tried to seduce Igor and drag him off into the sea.

Episode: Igor and the Siren - Igor meets a beautiful woman as Helena grows suspicious of her.

Tori:

Character: Enerton (voiced by JB Blanc) - a giant evil robot who has been absorbing and gaining energy.

Episode: Energy Thief - Tori and Boris have to fight an energy stealing robot.