Papa Nottachalla Acachalla was the fraternal twin brother of Papa Acachalla, because they both had bald spots. He pretended to be a vet for Princess for Papa, but ended up getting chased by Gertrude when he flirted with Elsa.
Notachalla is Papa Acachalla's twin brother is a veterinarian and posed as a vet for the Rancor Pet Mod. However, his ruse is discovered and Gertrude chases him around the house with a crossbow before accidentally killing the faux-pet, Elsa. Notachalla is distraught at the death of "the princess", having tried to chat her up all through his appearance in the video.