- Voice actor: Eric Stuart (both English and Japanese)
Ariados is a spider-like Pokémon in appearance. It has a red body with black stripes and an unhappy face on its abdomen. Ariados has four yellow legs with purple stripes; its fifth and sixth legs seem to have been moved onto its back. Both the horn and mandibles on Ariados are white. Its height is 3'07" and weight is 73.9 lbs.
Ariados's feet are tipped with tiny hooked claws that enable it to scuttle on ceilings and vertical walls. It spins a single strand of a special string endlessly out of its rear. The string leads back to its nest. The string can also be spun from its mouth. It is hard to tell which end is which. This Pokémon constricts the foe with its webbing.
Rather than making a nest in one specific spot, it wanders in search of food after darkness falls. It will attach silk to its prey and set it free. Later, it tracks the silk to the prey and its friends.
- Main article: Pokémon food
It is certain that it is a hunter. It is one of the few Pokémon that has been depicted catching other Pokémon to consume.
An Ariados owned by J appeared in Mutiny in the Bounty! As J proceeds to steal her victims' Pokémon, she has her Ariados tie up her victims with String Shot. J's Ariados also made a short appearance in Pillars of Friendship!, where J told it to use String Shot to tie up Ash and co. and prevent them from stopping the legendary golems and Regigigas as well.
In Following a Maiden's Voyage!, some Ariados attacked Dawn and her Piplup. Several Ariados attacked Dawn and her Piplup again in Stopped in the Name of Love!. Even more Ariados attacked Dawn and Piplup in Historical Mystery Tour!. A Shiny Ariados and many other Ariados attacks Dawn and Shinko in SS024.
Ariados were mentioned by Misty in UnBEARable when Ash, Brock, and Misty were talking about scary Pokémon in the woods.
Ariados, Long Leg Pokémon. The evolved form of Spinarak. Ariados is able to spin extremely strong and sticky webs to trap its adversaries.