Even with the best instructions, things can go wrong. Here are some common problems and their solutions.

Insert your 3DS SD card into your computer. Navigate to luma/titles/ and create a folder matching the Title ID of your version of Ultra Sun or Ultra Moon.

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: Boss encounters are tweaked to feature randomized or significantly harder Pokémon. Core Ruleset

You may only catch the very first Pokémon you encounter in each named route or area. If it faints or runs away, you get nothing.

Ultralocke is a specialized, fan-created "Nuzlocke" variant for Pokémon Ultra Sun Ultra Moon

The original Ultralocke series utilized specialized mods that introduced custom textures, unique forms (e.g., Sinister Forms), and altered Pokémon stats, making the gameplay a true "surprise" in every patch of grass.

Because modifying a 3DS game file manually can be tedious, prominent ROM hackers have created custom versions of USUM built specifically for challenges like the Ultralocke. The most popular choice is Buffel Saft’s . These hacks feature: All 807 Pokémon available to catch throughout the story.

Download your chosen Ultralocke mod patch (usually a folder containing files like code.bps or a romfs folder).

: Built into Luma3DS, this allows you to apply mods without permanently changing the base game. 2. Installation Steps Dump Your Game

Manually enforce the Nuzlocke and Ultralocke rules from the very first route.

: You may only catch the first wild Pokémon you encounter in each new area.

To play this on a PC, Mac, or Android device, you will need a reliable Nintendo 3DS emulator. (or its active community forks) remains the gold standard for 3DS emulation, offering high-resolution graphics and smooth framerates. Step 2: Obtain a Clean USUM ROM

: Any Pokémon that faints is considered "dead" and must be boxed or released.