Dracovish first appeared when Cara Liss and Bray Zenn restored it and an Arctozolt from Fossils they had discovered in the Wild Area. Ash attempted to greet it, but it responded by attempting to bite him and then proceeded to chase him and Pikachu. As it chased Ash, he commanded Pikachu to use Electroweb to stop it, but Dracovish tore through it and accidentally attacked Arctozolt, which got angered and created a field of ice using Icy Wind, that both Ash and Dracovish slipped on, resulting in Ash winding up on top of the Fossil Pokémon as it ran away. It ran a long way to a pond, where Ash realized it had just wanted a swim. After they had returned to their starting point, Cara Liss and Bray Zenn let Ash and Goh keep the Fossil Pokémon, since they had already gotten the data they wanted about them. As such, Ash caught Dracovish, while Goh caught Arctozolt.
In JN063, Ash entered Dracovish in the Kids Marine Athletics Race. After winning the race, Dracovish helped to free Chloe from a cave she had been trapped in by using Fishious Rend.
In JN065, Ash used Dracovish in his World Coronation Series battle against Iris at the Opelucid Gym, sending it out against Iris's Dragonite. Dracovish succeeded in catching Dragonite in its mouth with Fishious Rend, before defeating it with a super effective Ice Fang. Next, Dracovish went up against Iris's Haxorus, but was quickly defeated by a combination of Dragon Pulse and Psycho Cut.
Dracovish has a habit of nibbling on people's heads, especially Ash. Dracovish even likes playing in places where there is a lot of water to swim in and enjoys spending time with other Water Pokémon, as shown by it hanging out with Goh's Water Pokémon at the Cerise Laboratory. While Dracovish is a somewhat slow swimmer, its strong legs and gills allow it to run underwater at high speeds if it sinks to the bottom. In JN063, its unusual body composition helped it and Ash come in first in the Kids Marine Athletics Race.
Dracovish strongly dislikes disappointing Ash, becoming extremely determined to prove itself, as shown in JN063 when it used Fishious Rend after Ash assured it that it was alright if it did not know the move. Dracovish has very powerful jaws, being able to crush boulders with a single bite, and in JN065 stopped Iris's Dragonite mid-attack by trapping in it's jaws.