Pokemon Uranium Type Chart Explained: Nuclear Matchups, Moves & Battle Tips

Why the Pokemon Uranium Type Chart Is Different From Any Mainline Game

The Pokemon Uranium type chart starts with the 18 types you already know and then breaks the rules with a nineteenth. Normal, Fire, Water, Grass, Steel — all present, all behaving exactly as veterans expect. Then you run into your first feral Nuclear-type, and every matchup you memorized suddenly needs a footnote. Understanding the Pokemon Uranium type chart, especially that Nuclear column, is the fastest way to stop losing battles you should be winning.

Nuclear matters because it is simultaneously the strongest offensive type in the game and the weakest defensive one. A single Nuclear attack can delete a defensive wall; a single wrong switch-in can delete your Nuclear attacker. That tension is exactly why the chart is worth memorizing. For download details and patch notes, see the official Pokemon Uranium website.

Nuclear Type Matchups: Offense and Defense Side by Side

Offensive matchups: what Nuclear hits

Nuclear is super effective against 17 of the 19 types in the game. Only Steel and Nuclear itself resist it, and nothing is immune. That gives Nuclear the widest super-effective coverage anywhere in the Pokemon Uranium type chart.

Defensive matchups: what hits Nuclear

Only Nuclear resists Nuclear. Every other type in the game hits it for double damage, including Poison and Steel, which are not usually known for offensive pressure. This is why Nuclear sweepers work best as late-game cleaners rather than switch-in answers.

One quirk worth flagging: Nuclear is the only type in Uranium that takes super effective damage from Normal-type moves. That single interaction turns otherwise forgettable Normal-type attackers into genuine revenge killers against a weakened Nuclear threat.

How the Nuclear Type Compares to Shadow Pokemon

Nuclear is best understood as Uranium's answer to the Shadow type from Pokemon Colosseum and Pokemon XD: Gale of Darkness. Both represent corrupted Pokemon that hit hard and may ignore their trainer, but they are not identical systems.

The practical takeaway: corrupted Nuclear Pokemon are a temporary problem with a story-based fix, while naturally Nuclear Pokemon are stable, obedient team members you can build around from the moment you catch them.

Nuclear-Type Moves and Abilities Worth Building Around

The Nuclear movepool is small but brutally efficient. According to the Pokemon Uranium Wiki, only a handful of Nuclear moves exist, and two of them do most of the heavy lifting.

Expunge is the Nuclear mirror-breaker. In a Nuclear-versus-Nuclear standoff, the Pokemon that fires off Expunge first usually wins, because the bonus damage against Nuclear-types stacks on top of an already high base power. Atomic Punch is the safer, more spammable option thanks to its 95% accuracy.

Two abilities define how Nuclear teams function:

Geiger Sense is a snowballing ability — the longer a Nuclear-type stays on the field, the more dangerous its bearer becomes. Lead Skin is the hard counter: a Hazma or Geigeroach can sit in front of any Nuclear attacker and take zero damage from its STAB.

Community reports note that in earlier versions of the game, Nuclear moves were far less widely distributed. Atomic Punch was once Urayne's signature move, and Nuclear Wind belonged to a Mystery Gift Pahar. Later updates spread Nuclear coverage across more corrupted Pokemon, which is why feral Nuclear encounters feel so much more threatening today than they did at launch.

Nuclear-Type Pokemon and Corrupted Forms

There are two very different categories of Nuclear Pokemon: the stable naturals and the corrupted ferals.

The wiki currently lists seven natural Nuclear-types, roughly 3% of the dex, plus 36 Pokemon that can appear in a corrupted Nuclear alternate form. Corrupted Pokemon are aggressive, may disobey their trainer, and cannot breed — a change that was patched after an earlier glitch allowed feral Nuclear forms to produce non-Nuclear offspring. Naturally Nuclear Pokemon, including Nucleon, Hazma, Geigeroach, and the Xenomite line, can breed normally.

A community-reported detail worth knowing before you plan a living dex: several corrupted lines become permanently unobtainable without trading once you pass certain story points. The Chyinmunk line is reported to disappear after Nuclear Plant Epsilon, while the Chupacho, Corsola, Magikarp, and Tubjaw lines reportedly become unavailable after Nuclear Plant Omicron. Catch them early if you want them.

Battle Tips: How to Play Around the Nuclear Type Chart

Here is how to turn the matchup data into wins.

• Bring a Steel-type as your Nuclear answer. Steel resists Nuclear and hits it back super effectively, making it the only type that wins the exchange on both sides of the chart.
• Use Lead Skin as a hard wall. Hazma and Geigeroach ignore Nuclear moves entirely, so they can pivot in on a predicted Nuclear attack with zero risk.
• Punish Nuclear with Normal-type priority. Since Nuclear is the only type weak to Normal, a priority Normal move is a reliable way to pick off a weakened Nuclear sweeper before it snowballs.
• Never switch a Nuclear-type in directly. With 18 weaknesses, almost every attack on the field threatens it. Bring it in after a knockout.
• Expect disobedience from corrupted catches. Feral Nuclear Pokemon may ignore orders until they are cured through the story, and curing them does not change their typing, appearance, or moveset.
• Do not build a wall out of Nuclear. It has no immunities and no neutral matchups outside its own type — it is purely an offensive tool.

FAQ

How many types are in the Pokemon Uranium type chart? Nineteen. The game uses the standard 18 types plus Nuclear, which was created specifically for Uranium and has no equivalent in the official mainline games.

Is the Nuclear type good? Offensively, yes — it hits 17 of 19 types for super effective damage. Defensively, it is the worst type in the game, taking double damage from 18 types and resisting only itself.

What is the best counter to a Nuclear-type Pokemon? A Steel-type is the cleanest answer because it resists Nuclear attacks and deals super effective damage back. Hazma and Geigeroach with Lead Skin are even better, since they take no damage from Nuclear moves at all.

Can corrupted Nuclear Pokemon be cured? Yes. During the story, corrupted Nuclear Pokemon can be cured so they behave normally and obey orders. Their typing, appearance, and moveset stay exactly the same afterward, so a cured corrupted Pokemon is functionally identical to a wild-caught one.