Serperior is a serpentine Pokémon, much like Dratini, Dragonair, or Seviper. However, it is the first Grass-type serpentine Pokémon. Serperior has a white face and neck with pale-green designs on the top of its head with two yellow leaf-like extensions on the back of its head. It has a dark green body with a pale-green underside with two, swirly yellow designs on it, similar to Rayquaza. The small wing-like protrusion from its previous form is now its collar being curled and leaf-like, being green on the exterior and yellow in the interior. It has two green small, stubby hands with no fingers. It now completely lacks any legs and now must slither about due to its new, serpent form. Its red eyes are also relatively small in comparison with Snivy's. Its long, green tail has three small green leaves sprouting from it. Also known as the Regal/Royal Pokémon, Serperior is very different from its first evolution, Snivy.
Serperior's name is a combination of the words "serpent" and "superior."This is the second Pokémon to have its name based on the word "superior," with the first being Rhyperior.
Serperior is based on western culture (royalty), whereas Samurott and Emboar are based on Japanese and Chinese culture, respectively.
Unlike other snake-based Pokémon such as Arbok and Seviper, Serperior is not even part Poison-type.
Despite being the final stage in a 3-Pokémon evolutionary chain and having a base stat total of 528, Serperior still has the same Special Attack stat as an Oddish (and the same Attack stat as a Bellsprout).
Serperior is the second tallest Pokémon in Generation V, shorter than both Black Kyurem and losing to White Kyurem by about 2 feet altogether, (Black= 11 feet, white= 12 feet).
Serperior is very different from its first evolution, Snivy. Its appearance changed dramatically.