The legal conflict between Nintendo Co., Ltd., The Pokémon Company, and Pocketpair, Inc., the developer of the breakout hit Palworld, represents a landmark case in the intersection of video game mechanics and intellectual property law. Filed in the Tokyo District Court in September 2024, the lawsuit moved beyond initial filings into a complex phase of patent examination and tactical gameplay adjustments throughout 2025 and into 2026. Contrary to early social media speculation, the core of this dispute is not centered on character designs or artistic similarities—often referred to as the "look and feel" of the creatures—but rather on specific, technical gameplay systems that Nintendo has protected under Japanese patent law.

As of April 2026, the litigation remains active. While some industry rumors suggested a confidential settlement, official court proceedings and continued patent validity challenges at the Japan Patent Office (JPO) indicate that both parties are still deeply engaged in a battle over the future of creature-collection mechanics.

Why is Nintendo Suing Palworld for Patents Instead of Copyright?

In the early weeks of Palworld's massive success—selling over 25 million copies in its first month—the public discourse focused almost entirely on the visual similarities between "Pals" and "Pokémon." However, Nintendo and The Pokémon Company chose a much more precise legal weapon: patent infringement.

Copyright law protects the specific expression of an idea, such as a character’s unique drawing, a specific musical score, or actual lines of code. It is notoriously difficult to win a copyright case based on "similar concepts" (like a yellow electric mouse) if the assets themselves are not identical copies. Patent law, however, protects functional inventions and technical methods. By focusing on patents, Nintendo is targeting the underlying mechanics of how Palworld functions as a software product.

This strategy allows Nintendo to bypass the subjective debate over whether a creature looks "too much like a Pikachu" and instead focus on objective technical processes, such as the mathematical probability of a capture device succeeding when thrown at a virtual entity.

What Specific Patents are Involved in the Lawsuit?

The lawsuit filed in Tokyo centers on three specific Japanese patents that Nintendo alleges Pocketpair infringed. These patents do not cover the idea of "catching monsters" in a general sense, but rather the specific technical implementation of these systems in a 3D environment.

The Creature Capture Mechanism (Patent No. 7545191)

This is perhaps the most critical patent in the case. It describes a system where a player character aims and throws a capture item (a "sphere" or "ball") at a field creature. The system then determines a success or failure outcome based on variables and displays a visual indicator of that success probability to the player.

In Palworld, the use of "Pal Spheres" mirrors this process. Nintendo argues that the specific sequence—aiming in a 3D space, the trajectory of the projectile, the collision detection, and the triggered capture animation—falls directly within the scope of their protected intellectual property.

The Riding and Mounting System (Patent No. 7493117)

Palworld heavily features the ability to ride various Pals for land, sea, and air travel. Nintendo’s patent No. 7493117 covers the technical transition and control scheme used when a player character mounts a creature. This includes how the camera adjusts, how the player’s input is remapped to the creature’s movement set, and the state change of the player model during the mounting process.

Character Switching While Riding (Patent No. 7528390)

This patent relates to the seamless transition between different creatures while the player is in a "riding" state. For example, jumping off a flying creature and immediately summoning or switching to a water-based creature to continue movement. Nintendo refined this patent specifically to cover the technical handoff between different character models in a real-time 3D environment.

How Nintendo Used Divisional Patents to Target Palworld

A key point of contention in the legal community is the timing of these patents. All three patents cited in the lawsuit were granted in 2024, after the launch of Palworld. However, they are "divisional patents" derived from an original parent application filed in 2021.

Divisional applications allow a company like Nintendo to take an existing broad patent application and "divide" it into smaller, more specific patents years later. This is a common strategic move in intellectual property management. By filing these divisionals in 2024, Nintendo was able to tailor the language of the patent claims to more closely match the specific mechanics observed in Palworld’s early access version.

Pocketpair’s defense has focused on this "retroactive" feel, arguing that the mechanics were already industry standards or that the patents lack the "inventive step" required by law because games like Ark: Survival Evolved and Monster Hunter had implemented similar systems years prior.

How has Palworld Changed Because of the Lawsuit?

Faced with the threat of an injunction that could potentially block the distribution of Palworld in Japan, Pocketpair has proactively implemented several gameplay changes. These modifications are designed to "design around" the specific claims made in Nintendo's patents.

Changes to the Summoning Animation

In Patch 0.3.11, released in late 2024, players noticed a significant change in how Pals are brought into the world. Previously, the player character would perform a throwing motion with a sphere, and the Pal would emerge from where the sphere landed—a mechanic nearly identical to the Pokémon series. Following the lawsuit, this was altered. Pals now materializing instantly beside the player or appearing via a different visual effect that avoids the "throwing a capture device to summon" sequence described in Nintendo's patents.

Modifications to the Gliding Mechanic

Another notable change appeared in Patch 0.5.5 in mid-2025. The mechanic for "Gliding" using specific Pals was updated. In earlier versions, the player would physically grab onto a Pal to glide. The update transitioned several of these interactions to require specific "Glider Equipment," changing the technical state of the player character from "holding a creature" to "using an item," thereby distancing the game from Nintendo's riding and mounting patents.

These changes suggest that while Pocketpair is fighting the lawsuit in court, they are also preparing for a scenario where they might need to prove that their game can function without the contested mechanics.

Why Did Nintendo Only Seek 10 Million Yen in Damages?

One of the most surprising aspects of the initial filing was the requested damages: approximately 10 million yen (roughly $66,000 USD), split between Nintendo and The Pokémon Company. Given that Palworld earned hundreds of millions of dollars in its first few months, this figure seems negligible.

However, in Japanese patent litigation, the financial damages are often secondary. The real objective is Injunctive Relief. If Nintendo wins, the court could order Pocketpair to stop using the infringing mechanics entirely. Because these mechanics—catching, riding, and summoning—are the "core loop" of Palworld, an injunction would essentially force the game to be taken offline or undergo a total mechanical rebuild. The 10 million yen is a symbolic "placeholder" amount that can be increased later in the proceedings once the court determines the extent of the infringement.

What is the Role of Prior Art in the Defense?

Pocketpair’s primary defense rests on "Prior Art." In patent law, an invention must be new and non-obvious. If a mechanic was already present in other games before Nintendo filed its patents, those patents can be declared invalid.

In October 2025, the Japan Patent Office (JPO) rejected a patent application related to the Nintendo-Palworld case (Application No. 2024-031879). The examiner cited "prior art" from:

  • Monster Hunter 4 (2013)
  • Ark: Survival Evolved (2015)
  • Craftopia (Pocketpair’s own earlier game)
  • Pokémon GO

While this was not one of the three specific patents used in the lawsuit, it provided a significant morale boost for Pocketpair. It demonstrated that the JPO is skeptical of Nintendo’s attempts to claim broad ownership over "creature-catching" logic. Pocketpair is using these rejections to argue that the patents in the lawsuit should also be invalidated.

Frequently Asked Questions about the Palworld Lawsuit

Is Palworld being removed from Steam or Xbox?

As of 2026, Palworld has not been removed from any storefronts. The game remains operational and continues to receive content updates. An injunction would only happen after a final court ruling, which could still be months or years away given the appeal process in Japan.

Did Nintendo lose the lawsuit in 2025?

No. There was widespread misinformation online claiming Nintendo "lost" after the JPO rejected a related patent application. In reality, the lawsuit in the Tokyo District Court is separate from patent office examinations. While a rejection at the JPO can influence the judge, the lawsuit itself is ongoing.

Can Nintendo sue other "monster-tamer" games?

Technically, yes, if those games use the specific technical methods described in Nintendo's patents. However, Nintendo typically only takes legal action when a competitor achieves massive commercial scale that they perceive as a direct threat to their brand's ecosystem.

What happens if Pocketpair wins?

If Pocketpair successfully defends itself or has the patents invalidated, it would be a major victory for independent developers. It would establish a precedent that common gameplay mechanics (like throwing an object to catch a creature) are part of the "public domain" of game design and cannot be monopolized by a single corporation.

Summary of the Current Legal Situation

The Palworld lawsuit is a marathon, not a sprint. The key developments to track as we move through 2026 include:

  1. The Validity Trials: The JPO’s ongoing review of the three specific patents cited in the case.
  2. The First Instance Judgment: The Tokyo District Court's initial ruling on whether infringement occurred.
  3. Technical Workarounds: Whether Pocketpair continues to alter the game’s code to mitigate the risk of an injunction.
  4. International Expansion: How this Japanese lawsuit affects Palworld's presence in other markets, such as the United States, where patent laws differ.

Regardless of the outcome, the case has already forced the gaming industry to reckon with the power of software patents. For developers, it serves as a reminder that even if your art is original, your underlying "systems" might be walking through a legal minefield. For players, it highlights the aggressive nature of intellectual property defense in the modern era of "live-service" gaming.

As the litigation proceeds, Palworld remains a symbol of both the creative potential of the survival genre and the legal complexities of challenging an industry titan like Nintendo. The final verdict, which may not arrive until late 2026 or 2027 after appeals, will undoubtedly reshape how developers approach the design of "creature-collecting" experiences for a generation.