Feraligatr is a bulky, bipedal, crocodilian Pokémon with blue scales. It has large, powerful jaws lined with several sharp fangs. Three teeth are visible when its jaws are closed: two in its lower jaw and one in its upper. Its eyes are red with black markings around them and ridges above them and its lower jaw is yellow. There are three red spines on its body, each with three points: one on top of its head, one between its shoulders, and one near the tip of its tail. There are also several groups of large, rectangular scales on its arms, knees, tail, and waist. Its back is slightly hunched with ridges behind the shoulders and hips. On its lower body is a yellow, V-shaped marking that extends up to its thighs; there is a thin line through the center of the marking. Its arms have five clawed fingers and its feet three clawed toes.
Feraligatr opens its powerful jaws to intimidate its foes and viciously shakes its head once it clamps down on foes or prey. Because it has difficulty supporting its weight out of the water, it has been known to move on all fours. However, when hunting or fighting, it is agile and fast, due to its powerful hind legs. Feraligatr can rarely be found living near the water's edge.
Wani-Wani is a Feraligatr owned by Marina, which she received in The Legend of Thunder! as a Totodile. It appeared in A Stand-Up Sit-Down!.
Feraligatr made its main series debut in Ring Masters, under the ownership of Raiden, who entered it in Rikishii Town's Sumo Conference. During the competition, it battled and defeated a Golem and a Blastoise before being defeated by Ash and his Snorlax, who both used impressive improvisations in order to win.
In The Perfect Match!, a Trainer's Feraligatr competed in the Whirl Cup. Its match against Trinity was initially interrupted by Team Rocket. After Feraligatr worked together with Trinity's Golduck, Misty's Poliwhirl, and Ash's Totodile to defeat them, it finished the battle off-screen, emerging victorious.
In The Blue Badge of Courage, Kinso sent out a Feraligatr with the intent of battling Misty's Corsola. However, the battle was called off when Psyduck came out instead and was scared by Feraligatr.
In Pokémon Ranger: Heatran Rescue!, Ben summoned a Feraligatr twice using Ranger Signs. The first time was to rescue him from falling, and the second was to rescue him again at a volcano and then use Ice Beam on it.
In Genesect and the Legend Awakened, a Feraligatr living in Pokémon Hills was the first Pokémon to try to fight the Genesect Army and break into the nest. It also assisted in putting out the fire that broke out as a result of the battle.
Feraligatr debuted in Trouble in Big Town, where it helped Pichu Big, Magby, and Smoochum get out of some water.
In A Claim to Flame!, a male Trainer's Feraligatr was used in a qualifying match for the Silver Conference.
In Gonna Rule The School, the Pokémon Trainers' School lent a Feraligatr to a student for use during a battle with a Typhlosion.
In New Plot, Odd Lot!, a Coordinator's Feraligatr competed in the Mulberry Contest.
A Feraligatr appeared in Pokémon Mystery Dungeon: Explorers of Sky - Beyond Time & Darkness.
In One Team, Two Team, Red Team, Blue Team!, Brock used a Feraligatr provided by the Pokémon Summer Academy for the second leg of the Pokémon Triathlon.
In PK20, a Feraligatr was in the city.
In Challenging a Towering Figure!, a Trainer's Feraligatr battled Ash's Pikachu during the Festival Battle Challenge.
A Trainer's Feraligatr appeared in Regaining the Home Advantage!.
A Trainer's Feraligatr appeared in The Power of Us.
||Feraligatr, the Big Jaw Pokémon. The final evolution of Totodile. Once a Feraligatr has clamped its powerful jaws around an opponent, it won't let go until the opponent is defeated.
A Feraligatr briefly appeared in GOTCHA!, under the ownership of Silver.