After a PS5 version of the title was mentioned in a list of TGS titles, speculation mounted that a PlayStaton port for the survival game would finally be announced.
"At this moment, we are unaware of the specific patents we are accused of infringing upon, and we have not been notified of such details," the Japanese studio says.
"This lawsuit seeks an injunction against infringement and compensation for damages on the grounds that Palworld infringes multiple patent rights," Nintendo says.
"Palworld was never designed with that model in mind, and it would require too much work to adapt the game at this point," Pocketpair says.
A PS5 version of the survival title is mentioned in a list of games appearing at TGS, which was published by Japan's CESA.
Summoned Pals also receive 25 percent less damage, while tomato and lettuce production efficiency on farms has been buffed.
The joint venture's goals include developing the IP's reach and expanding on "global licensing and merchandising activities."
The Pokemon Company previously said that it would "investigate and take appropriate measures to address any acts that infringe on intellectual property rights related to Pokémon."
New items, weapons and builds are also available alongside the new Meteorite Event, in which players can capture an "unknown" new Pal.
Pocketpair CEO Takuro Mizobe also dreams of a "true PvP mode" akin to Ark or Rust, with Arena considered "kind of an experiment."
The recent social media activity of Palworld's community manager might be pointing to an upcoming PS5 release for the game.
Pocketpair's monster catching survival game is headed to a new Japan-inspired island with its next update.
New Pals and subspecies, weapons, a new faction leader to challenge, increased level caps, new building types and PvP await.
Pocketpair promises a "LOT of exciting things to reveal" for its survival sandbox creature collector at the upcoming showcase.
When dropping items and Pals on death, anyone on the server can pick them up for 24 hours (and they'll also disappear in 48 hours).
Its upcoming Summer update features four new Pals, an island with various biomes to explore and some new weapons for players.
Four new Pals, a flamethrower and futuristic rifle, and a new island with sakura trees await players this coming Summer.
The patch is live on PC and reduces the jittering of sleeping Pals on their beds and the hit detection of specific Pal attacks.
Pocketpair also revealed that it's working hard to prepare its PvP-focused Arena update for players "as soon as possible."
The teaser sees two trainers facing off, with three Pals on each side and players free to support their team until a victor remains.