Nintendo and The Pokémon Co. are suing the makers of Palworld, claiming the game infringes on the “Pocket Monster” franchise’s patents.

Pocketpair, the makers of Palworld, said they were ‘investigating’ the claims that their characters look too much like Pokémon.

Nintendo and The Pokémon Company have filed a patent infringement lawsuit against Pocketpair in Tokyo. Pocketpair is the Japanese video game developer behind Palworld, a game people have been describing as a Pokémon parody,