Seemingly as part of its ongoing lawsuit against Palworld's developer, Pocketpair, Nintendo applied for several patents to protect what it saw as intellectual property being ripped from Pokémon games. One of those early patent filings at the Japanese Patent Office (JPO) described effectively the creature capture mechanics you see in most Pokémon and similar games these days. The patent describes the game mechanic as throwing an object at a character, after which the computer determines whether the character in question is successfully captured. It also mentions throwing an object at a character in a game in order to limit the character's movement in the field. According to Games Fray , this patent application has now been denied, meaning Nintendo may have to find another linchpin in its ongoing lawsuit against Palworld's developer.

The denial of the patent comes after the patent office examined prior art that was submitted by an unnamed third party. As Games Fray goes on to explain, however, the decision to deny Nintendo's patent doesn't necessarily spell victory for Palworld and Pocketpair. Firstly, the patent denial is "non-final," which means Nintendo can contest the ruling and defend its position. Secondly, and this appears to be more important, while Japanese judges regularly do consult with the JPO and respect the decision of the Patent Office, the patent is non-binding, meaning the final decision is still up to the judge's discretion. For Nintendo's part, the patent in question forms a core part of a family of patents, so if it is eventually "finally" denied, Nintendo may lose additional resources to fight against its perceived threats, since that patent would weaken its claim to other patents in the patent family.