Eelektross is long eel-like Pokémon. It is top half is navy blue, while its underbelly is cream colored. It has a large open red-rimmed mouth with sharp fangs encircling it. It has red eyes with black pupils and yellow markings surrounding its eyes and tapering into two yellow specks on its side. It has long tentacle-like arms with three claws on each, and a circular red and yellow pattern on the underside of its tentacles. It has a long navy blue fin with a cream colored frill atop its head that extends down its back; another cream-colored fin extends from its lower back, and it has two small ovular fins that serve as its feet, which it walks upon.
Eelektross only has the ability Levitate which prevents Eelektross from being affected by Ground-type moves. Because of this, Eelektross has no weaknesses.
An Eelektross was seen in the Anime belonging to Subway Boss Emmet. It was first used in Battle for the Underground!, to power an old railroad car with Discharge. It is once again used in Lost at the Stamp Rally! to battle alongside Ingo's Chandelure with Cilan's Pansage and Ash's Tepig. Being far more skilled trainers, the Subway Bosses won the battle with Eelektross and Chandelure, as their Pokémon were fully-evolved and more powerful.
Like in the games, Ghetsis owns an Eelektross, which he used twice. The first time, he uses it to paralyze Black and steal the Dark Stone. Eelektross is called up again when Ghetsis battles Black in a 6-on-6 match. It beats both his Carracosta and Braviary with his Electric type, but is defeated by the shear power of Embor's Flare Blitz.
Even though Eelektross is an Electric Fish Pokémon, it is not a Water-type.
Despite the fact that Eelektross is the Electric Fish Pokémon, it hops up and down on feet like appendages, instead of floating as if it is swimming like other fish Pokémon.
Despite having "no weaknesses" due to its Levitate ability, Eelektross can still be hit by Ground-type moves if the Pokémon using the move has the ability Mold Breaker or the Pokémon has used the move Gravity in the previous turn.
Despite some Pokédex entries saying Eelektross uses its fangs to shock its prey with electricity, it cannot learn Thunder Fang.