If you encounter a bug and it is not on here, you are welcome to add it. If at all possible, include a screenshot demonstrating where the bug took place.

Betanotice Gameplay Notice

The information here has accumulated since beta and does not accurately represent the current state of the game. Please check the Patch Notes

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Pokémon Uranium Bugs

Game Breaking Bugs

Triggering these bugs can cause players to get stuck, preventing progress. Many of these are avoidable, and the way to avoid it is marked in bold. If you encounter one of these bugs, do not save your game and reload an old save file instead.

  • Interrupting the 5 trials event at the Snowbank Town Gym, by either losing a battle or leaving, causes the event to become broken, preventing the player from progressing. To avoid this, make sure to save before talking to Theo to start the event. You can still heal and change your party after the 5 trials, before facing the Gym Leader.
  • In the Nuclear Plant Epsilon sidequest, losing to the boss Trawpint at the end of the quest causes the player to become stuck on the dock on Route 07, unable to move. Make sure to capture or defeat Trawpint.
  • By surfing in a specific location in Venesi City, you can become stuck underneath a bridge and unable to escape. (screenshot needed) Fixed in 1.1.0
  • Losing to a Nuclear horde at Nuclear Plant Zeta will leave the game in an impassable state. Be sure to save before Nuclear Hordes to have a ready save if this occurs. Fixed in 1.0.1UnF

Crashing Bugs

Some of the more obvious bugs, these are often very simple errors but cause the game to freeze and an error message to be displayed. The player will have to reload their last save. These bugs are usually avoidable.

  • On Route 15, an item ball behind the fisherman (Eviolite) causes the game to crash when interacted with. Fixed in 1.0
  • In Venesi City, if you stand on the lowest possible tile (behind the wall) while walking past the Ratsy, you may be locked in the cut-scene where the Ratsy runs behind the building. Fixed in 1.1.0
  • Locking your computer (with Windows + L) will make the game crash
  • Crashes when nicknaming a Pokemon hatched from an egg. Don't nickname Pokemon when they hatch -- you can change their names at the Name Rater in Nowtoch City.
  • Sometimes when fishing, an error message will pop up once the Pokémon is caught, causing the game to crash.
  • When starting a new game going down to the lake in Moki town will cause the game to crash.
  • If you have started a new game, after the Pokemon catching tutorial, if you try to enter the grass leading to Route 1, the game might crash.
  • An error may occur in the battle against the ninja in the Championship. Fixed in 1.0.1
  • In various scenarios, saving and closing out the game in the midst of an event, or after getting spotted by an enemy trainer, can cause the game to crash upon loading up again. (hard to replicate, need more specific examples)
  • After the cutscene in the hall of fame the game might crash and reset. To fix this bug, turn off performance mode. If this does not solve the problem, please contact the discord team.

Save File Related

  • There is an issue with 4.0 being backwards compatible with save files from v3.1 and before. The game crashes on attempting to load the save file. To avoid this, rename your old save file (found in C:\User\My Saved Games\Pokemon Uranium\Uranium.rxdata) to anything else, or otherwise move or delete it.

Battle Related

Issues with the game's battle system.

  • Aftermath triggers independently if the user faints or not
  • The AI has difficulty with certain moves and will fail to attack. This has been known to happen with Gligar and Brailip.
  • Rest doesn't work, it just skips the player's turn. Fixed in 1.0
  • Light Screen causes the enemy trainer to stop attacking.
  • Some issues with probability of moves and abilities (eg. OHKO moves like Sheer Cold and on-hit abilities like Flame Body)
  • Curse does not raise Defense and Attack. Fixed in 1.1.0
  • It is possible for people to call during the wild Pokémon encounter animation. This will delay the animation until the call ends.
  • Nucleon fails to effectively use Last Resort:
  • Torment will lock the target in an endless loop if it uses a two-turn attack like Dig. If there is no way to damage the opponent, the game must be reset.
  • Fallout instead summons a Thunderstorm. Fixed in 1.0.4
  • Using a Poké Ball after using fly in a double battle traps the user of Fly in the semi-invulnerable state.
  • Expunge will instead summon a FalloutFixed in 1.2.0
  • Dazzling Gleam hits only one foe in Double battles. Fixed in 1.1.0
  • If a Pokemon holding a Macho Brace is used in battle, the battle will not end/continue after a 'mon is defeated, forcing the player to reset or run away.
  • Magic Guard does not protect wielder from thunderstorm damage.
  • When you are battling Fisherman Brendon for the 1st rematch, you may not be able to use different moves.
  • If you activate Mega-Evolution but use a potion instead of attacking, your pokemon does NOT Mega-Evolve and Mega-Evolution becomes unusable for the remainder of the battle. This only occurs if you use a potion and Mega Evo during the same turn.
  • Bad Dreams's effect once activated will appear to be occurring due to the opponent's ability.
  • Elementalist applies the STAB modifier to Fire- and Water-type moves regardless of the Pokémon with the ability.
  • If a Pokemon mega evolves and gains a weather changing ability such as Drought it will not activate in areas with overworld weather effects already in place.

Graphical errors

Includes: sprite errors, map mistakes (eg. walking on water), display bugs, etc. Screenshots are great here!

  • Sheldon lacks walking sprites, so his character sprite disappears when it moves. Fixed in 1.0
  • If a swimming trainer approaches you while you're on land, you can select him/her after the battle. It will ask if you want to surf. If you answer yes, you surf on the land, and the trainer's text is displayed. It then becomes possible to surf on that land and even for wild Pokemon to attack you while you're surfing there. Example:
  • Skip trainers in 6th (Psychic) Gym by stepping into pillar here: The game slides you here, where you can step up on more, slide to the left, step up, slide to the right, and the arrow hops you right to the gym leader. Fixed in 1.0
  • Trying to change the Speech Frame causes the text color to become a hard-to-read gray. (The option to change the speech frame has since been removed.)
  • A Nuclear Magikarp might have the same sprite as a normal Magikarp.
  • On Route east of Route 7, attempting to move down on this square blocks movement. Example: Fixed in 1.0
  • On the border between Routes 5 and 12, if you pause the game to look at a menu option that changes the screen and then go out of the pause menu, any part of your sprite that crosses the other side of the route border will not be displayed.
  • On route 12 there is a strip of 3 vertical blocks of water that cannot be passed through Fixed in 1.1
  • When entering Comet Cave the cave may become dark. Screenshot of the front entrance of Comet Cave:
  • Berry bushes may randomly turn invisible.
  • This nurse doesn't turn when speaking from below (on the ship).
  • The sailor clips through the wall when leaving the Vinoville Lake Ferry.
  • The player's head can go through Venesi City's bridges.
  • In the last room of The Labyrinth, there is an empty space near the exit door. Fixed in 1.1.0
  • In at least three places, Tsukinami Hotel ,Rochfale Town and Legen Town, all visible doors open and close together when exiting. (Seen in 1.1.0) (Legen Townscreenshot)
  • Cali has no walking sprite so when interacted from the side, she will vanish for a split second.
  • In the Route 11 mission, ranger Kellyn's sprite scrolls sideways and is mirrored on the right. But it's fixed when he deploys Empirilla
  • Moving down and immediately up on the lowest pokedex entry will cause a simple graphical glitch displaying the icon for that pokemon on the next on.
  • In the post game, going to Nuclear Plant Zeta Outside and flying out to anywhere will cause the green "haze" to stay. Fixed when you enter a building and leave.

GTS, Wonder Trade & Virtual Trainer

Errors involving the game's online features.

  • Game crashing error when interacting with GTS attendants without internet connection.

Game Client Issues

Errors with getting the game to run properly on people's computers.

  • Clicking on the game program icon sometimes doesn't launch the game. (Not sure, but it might have to do with RMXP runtime packages.)


  • When getting attacked from bugs Fixed in 1.1.0
  • Incoming PokéPod calls can interrupt certain actions, such as using a HM, encountering a wild Pokémon or entering a cave or building.


Bugs that don't fit into any other category.

  • Resetting the game by pressing F12 may sometimes cause the game to not start back up again.
  • Canceling out of the PC while holding a Pokémon deletes that Pokémon. Fixed in 1.0.1
  • Rest House on Route 15 has wild Pokémon inside. Fixed in 1.0
  • Picnicker in Route 5 follows your sprite around after battle -- harmless, but spooky!
  • In the water gym, there is a room with a blonde haired girl in the bottom right. If you move east as you enter the room, you can walk through the wall & over the water.
  • Collecting more than 99 berries causes the amount of berries in your bag to roll over.
  • Certain wild pokemon on the map have different cries when they are interacted with - an example is an Owten in Bealbeach City using Cubbug's cry.
  • Trying to surf into the boat from Bealbeach is possible and makes you able to surf on the ground. Fixed in 1.1.0
  • If you use Rock Smash on Route 1 and return later, the rock you smashed will reappear. However, it will still remember that you battled the trainers there.
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