With the Nintendo Switch, Pokémon Tekken DX can be played anytime and anywhere. Pokémon Tekken DX can be played in TV mode and handheld mode. In tabletop mode, two players can also engage in duels using one of the two Joy-Con controllers anywhere. The Pokémon fighter Decidueye joins the already known Pokémon from the arcade and Wii U versions. The helper Pokémon Litten and Popplio make their debut and offer their assistance to the player in battle.

In team battle mode, the player selects three Pokémon. The winner is the one who first defeats all of the opponent's Pokémon. In group battles, players are matched with opponents of similar skill levels within battle rooms, allowing for engaging and balanced online fights.

The daily challenge offers players a wide range of diverse daily tasks. Players can watch replays of battles from other trainers to refine their own skills. It is also possible to publish particularly good battles online and share them with other players.