This snake-like Pokémon can measure at up to 12 feet long. Its long purple body has a lavender underside and black hexagonal markings on the back; each marking has a black spike on it as well, forming a ridge down the spine. Its face is black with a purple forehead and snout, the latter of which hides a set of razor-sharp teeth, as well as a purple spike on the back of the head. Its jaws are purple and able to dislocate at the sockets, while its eyes are white with slit pupils.
Because of their muscular coils, Vypethon can crush boulders with ease. They use this powerful grip to kill prey as large as Stantler with little effort. They also have powerful digestive juices, which enable them to digest a meal, bones and all.
The first appearance of Vypethon, though not mentioned, was possibly in Error Terror! It was most likely Vypethon due to its ability to crush the vaccine that was attacking Ash and his friends - although Ekans, Arbok, and Seviper can also use Wrap. However, FawkesTheSkarmory has stated that it is indeed Vypethon, and indeed it made its official debut appearance in Antidote? Anti-Don't!, and was later captured by Jessie.
Jessie's Vypethon, like her Arbok and Seviper previously, has been used several times since then. It helped capture her Marigne in She Sells Sea Spells, and was used in the Appeals Round of the StormSurge Town Contest in Slippery When Wet.