Hackmons
These pokemon are not available through normal gameplay, and are thus only usable in formats that allow them on the Uranium Showdown! server. Click a pokemon's picture to go to its page.
Actan-Nuclear
The only pokemon in the game that quad resists the Nuclear type, with Intimidate softening blows it takes on the physical side. Unfortunately, its type also gives it quad weaknesses to Fire, Fighting, and Ground moves, the most common coverage types run by those using Nuclear type attacks. While it was catchable in early versions of the game, it has since been retconned to being a boss exclusive form that cannot be caught. It is the only pokemon that is uncatchable if it shows up during a Randomizer run of Uranium.
The only pokemon in the game that quad resists the Nuclear type, with Intimidate softening blows it takes on the physical side. Unfortunately, its type also gives it quad weaknesses to Fire, Fighting, and Ground moves, the most common coverage types run by those using Nuclear type attacks. While it was catchable in early versions of the game, it has since been retconned to being a boss exclusive form that cannot be caught. It is the only pokemon that is uncatchable if it shows up during a Randomizer run of Uranium.
Urayne-Gamma
The gigantic monstrosity that is Urayne's final form. The Chernobyl ability makes it incredibly difficult to take down without losing at least a few of your team's members in the process, as it reduces all damage Urayne takes on top of dealing extreme damage to all pokemon that aren't the Nuclear or Steel type every other turn as long as Urayne stays on the field. It lacks a back sprite in-game due to being a boss exclusive form, so any pokemon that uses Transform on it will have Urayne-Alpha's back sprite.
The gigantic monstrosity that is Urayne's final form. The Chernobyl ability makes it incredibly difficult to take down without losing at least a few of your team's members in the process, as it reduces all damage Urayne takes on top of dealing extreme damage to all pokemon that aren't the Nuclear or Steel type every other turn as long as Urayne stays on the field. It lacks a back sprite in-game due to being a boss exclusive form, so any pokemon that uses Transform on it will have Urayne-Alpha's back sprite.
Gengar
Everyone's favorite Gen 1 Ghost/Poison type, complete with Levitate in Gen 6 based formats, but Cursed Body in others. Does everything you'd expect a Gengar to do. Which is to say, doing a lot of damage and being generally annoying. It is exclusively used by Elite Trainer Adam in-game.
Everyone's favorite Gen 1 Ghost/Poison type, complete with Levitate in Gen 6 based formats, but Cursed Body in others. Does everything you'd expect a Gengar to do. Which is to say, doing a lot of damage and being generally annoying. It is exclusively used by Elite Trainer Adam in-game.
Gengar-Mega
There's no escaping from Mega Gengar due to its Shadow Tag ability, making it one of the most powerful Mega Pokemon in the game. And that's without even considering the stat buffs it gets from Mega Evolving. As it's exclusively used by Elite Trainer Adam in-game and uses a custom sprite, it lacks a matching back sprite.
There's no escaping from Mega Gengar due to its Shadow Tag ability, making it one of the most powerful Mega Pokemon in the game. And that's without even considering the stat buffs it gets from Mega Evolving. As it's exclusively used by Elite Trainer Adam in-game and uses a custom sprite, it lacks a matching back sprite.
Tonemy-Nuclear
The only feral Nuclear type with an official sprite in the game that's impossible to encounter during normal gameplay in the current version of Uranium. Thus, it has no Nuclear moves officially available to it (though if it did have one, it'd probably be Gamma Ray). It can be encountered, caught, and evolved without issue in the Randomizer mode however.
The only feral Nuclear type with an official sprite in the game that's impossible to encounter during normal gameplay in the current version of Uranium. Thus, it has no Nuclear moves officially available to it (though if it did have one, it'd probably be Gamma Ray). It can be encountered, caught, and evolved without issue in the Randomizer mode however.
Masking-Nuclear
Similar to Nuclear Tonemy, the Nuclear Masking line is only available in the Randomizer mode of Custom games, and thus have no Nuclear moves in their natural learnset. Unlike Nuclear Tonemy, however, the Nuclear Masking line does not have any Nuclear sprites, so they look exactly like their normal varieties when the randomizer spawns them. The sprites used here are placeholders until if/when they get official sprites.
Similar to Nuclear Tonemy, the Nuclear Masking line is only available in the Randomizer mode of Custom games, and thus have no Nuclear moves in their natural learnset. Unlike Nuclear Tonemy, however, the Nuclear Masking line does not have any Nuclear sprites, so they look exactly like their normal varieties when the randomizer spawns them. The sprites used here are placeholders until if/when they get official sprites.
Dramsama-Nuclear
Similar to Nuclear Tonemy, the Nuclear Masking line is only available in the Randomizer mode of Custom games, and thus have no Nuclear moves in their natural learnset. Unlike Nuclear Tonemy, however, the Nuclear Masking line does not have any Nuclear sprites, so they look exactly like their normal varieties when the randomizer spawns them. The sprites used here are placeholders until if/when they get official sprites.
Similar to Nuclear Tonemy, the Nuclear Masking line is only available in the Randomizer mode of Custom games, and thus have no Nuclear moves in their natural learnset. Unlike Nuclear Tonemy, however, the Nuclear Masking line does not have any Nuclear sprites, so they look exactly like their normal varieties when the randomizer spawns them. The sprites used here are placeholders until if/when they get official sprites.
Dramsama-Nuclear-Mega
Similar to Nuclear Tonemy, the Nuclear Masking line is only available in the Randomizer mode of Custom games, and thus have no Nuclear moves in their natural learnset. Unlike Nuclear Tonemy, however, the Nuclear Masking line does not have any Nuclear sprites, so they look exactly like their normal varieties when the randomizer spawns them. The sprites used here are placeholders until if/when they get official sprites.
Similar to Nuclear Tonemy, the Nuclear Masking line is only available in the Randomizer mode of Custom games, and thus have no Nuclear moves in their natural learnset. Unlike Nuclear Tonemy, however, the Nuclear Masking line does not have any Nuclear sprites, so they look exactly like their normal varieties when the randomizer spawns them. The sprites used here are placeholders until if/when they get official sprites.