Pokemon Uranium Eeveelutions Guide: All 9 Evolutions and How to Get Them

A complete guide to Pokemon Uranium eeveelutions, including Nucleon, evolution priority rules, where to find Eevee, and stats for all nine forms.

Why Eevee Is Uranium's Most Versatile Partner

Pokemon Uranium eeveelutions are the single best reason to keep an Eevee slot open on your team. This fan-made RPG does something the official games never did: it adds a ninth evolution, a Nuclear-type called Nucleon, on top of the eight classics. If you have ever watched an Eevee hit level 20 and transform into a form you did not want, you already know why this matters — Uranium runs its evolutions through a priority system, and guessing wrong costs you a team slot.

This guide walks through every Pokemon Uranium eeveelutions path, the item and party conditions each one requires, where to actually catch Eevee, and how to pick the form that fits your playstyle.

Eevee sits at Pokédex #129 in Uranium and keeps its classic identity: a Normal-type with an unstable genetic structure. The in-game Pokédex entry notes that radiation from stones causes it to mutate, which is a neat piece of world-building that explains both the standard stone evolutions and the Nuclear twist. The game itself is a long-running fan project with a well-documented and unusual history that drew mainstream gaming coverage after its 2016 release.

Here is Eevee's raw stat profile before any evolution:

Stat	Base Value	Notes
HP	55	Flat across the board
Attack	55	Not a physical threat yet
Defense	50	Lowest stat
Sp. Atk	45	Lowest offensive stat
Sp. Def	65	Highest stat
Speed	55	Middling
Total	325	Medium Fast leveling rate

Eevee also has a 45 catch rate, an 87.5% male / 12.5% female gender ratio, and yields 1 Special Defense EV. Its abilities are Run Away or Adaptability, with Anticipation as a hidden ability. Adaptability is the one worth hunting for if you plan to breed, since it doubles the Same Type Attack Bonus of Normal moves — though that bonus disappears the moment Eevee evolves into anything other than a Normal type.

All Nine Pokemon Uranium Eeveelutions at a Glance

Most players expect eight forms and are surprised by the ninth. Here is the full roster, with the trigger for each one.

Evolution	Type	How to Trigger It	Uranium-Specific Notes
Vaporeon	Water	Use a Water Stone	Stones always win, regardless of other conditions
Jolteon	Electric	Use a Thunder Stone	Same priority tier as other stones
Flareon	Fire	Use a Fire Stone	Same priority tier as other stones
Espeon	Psychic	Level up with no Nuclear-type Pokémon in your party	Nuclear types in the party block it
Umbreon	Dark	Level up with no Nuclear-type Pokémon in your party	Same party check as Espeon
Leafeon	Grass	Requires its evolution item	Remove that item to unlock Nucleon instead
Glaceon	Ice	Requires its evolution item	Same item conflict as Leafeon
Sylveon	Fairy	Requires its evolution item	Same item conflict as Leafeon
Nucleon	Nuclear	Level up (community reports say around level 20) with no item held	Uranium original; overrides level-up evolutions

Nucleon is the headline. It is a Nuclear-type, which means it hits many things hard in Uranium's expanded type chart, but Nuclear is also a defensively shaky type in most matchups. It is a glass-cannon pick, not a wall.

How to Evolve Eevee: Priority Rules and Pitfalls

This is where most Pokemon Uranium eeveelutions questions come from. Uranium does not evaluate every possible evolution equally — the game checks conditions in a fixed order, and the first one that passes wins.

Priority	Evolution(s)	What Has to Be True
1 (highest)	Vaporeon, Jolteon, Flareon	You used the matching stone. Nothing overrides this
2	Leafeon, Glaceon, Sylveon	The required evolution item is present
3	Nucleon	No item is held and Eevee levels up past the trigger point
4 (lowest)	Espeon, Umbreon	Eevee levels up with zero Nuclear-type Pokémon in your party

Stone evolutions ignore everything else

If you hand Eevee a Water, Thunder, or Fire Stone, you get Vaporeon, Jolteon, or Flareon. No party composition, no held item, and no level requirement changes that. This makes the three stone forms the safest choice if you want a guaranteed outcome.

Nucleon overrides level-up evolutions

The wiki's gameplay notice is blunt about this: evolving into Nucleon takes precedence over Eevee's other level-up-based evolutions. In practice, that means a Nuclear-type team member sitting in your party, or an item you forgot to remove, can quietly redirect your Eevee into Nucleon when you were aiming for Espeon or Umbreon.

Espeon and Umbreon need a Nuclear-free party

To land either of the classic friendship-style evolutions, you must clear every Nuclear-type Pokémon out of your party first. Community reports suggest evolving before level 20 is a reliable workaround if you cannot or will not rearrange your team.

Remove items to unlock the Nuclear path

The reverse also holds. If you want Nucleon but Eevee is holding the item required for Leafeon, Glaceon, or Sylveon, you have to take that item away. Until you do, the item evolution wins the priority check.

Where to Find Eevee in Pokemon Uranium

Eevee is not common, but it is not missable either. Uranium offers two realistic routes to one.

Method	Location	Details
Rare wild encounter	Route 13	Low encounter rate; bring plenty of Poké Balls
One-time gift	Venesi City	A guaranteed gift Pokémon — the simplest option
Held items	Anywhere	Eevee cannot be found holding an item

The Venesi City gift is the smart play for a first-time Eevee. It removes the randomness entirely, and you can soft-reset or breed afterward if you are chasing a specific nature or ability.

Eevee's base stats, typing, and battle notes

Eevee is pure Normal, which comes with one immunity and a couple of real weaknesses in Uranium's expanded chart:

Immune to: Ghost (0× damage)
Weak to: Fighting (2×) and Nuclear (2×)
Neutral against: everything else, including the standard 18 types

That Nuclear weakness is worth flagging. Because Uranium's Nuclear type is common in the later game, an unevolved Eevee is genuinely fragile in those fights. Evolve it before you head into Nuclear-heavy areas.

Moves worth teaching

Eevee's level-up movepool is thin — Helping Hand and Tackle at level 1 in the data most players reference. The real value comes from TMs and tutors:

Source	Move	Cost / Requirement
TM06	Toxic	TM
TM10	Hidden Power	TM
Move Tutor	Covet	4 Red Shards
Move Tutor	Echoed Voice	4 Blue Shards
Breeding	Charm	Breed with a compatible father
Breeding	Captivate	Breed with a compatible father

One piece of community trivia worth remembering: the only offensive moves Eevee learns by TM are Shadow Ball, Iron Tail, and Dig — and none of its nine evolutions share those types, so no evolution gets STAB from them. Teach them for coverage, not for power spikes.

Choosing Your Eevee Evolution: Which Form Fits Your Team

Because Eevee's own stats are so flat, you are effectively building the evolution, not the base form. Nature and EV investment matter more here than on almost any other Pokémon in Uranium.

Your Goal	Best Pick	Why It Works
Bulky Water support	Vaporeon	Water typing plus high HP makes it a reliable pivot
Fast special attacker	Jolteon	Electric speed threat that pressures Water and Flying types
Physical Fire coverage	Flareon	Hits hard on the physical side and checks Grass and Ice
Special wall / staller	Umbreon	Dark typing plus strong special bulk and Toxic synergy
Offensive Psychic presence	Espeon	Fast special damage with Psychic coverage
Grass coverage	Leafeon	Physical Grass attacker for Ground, Rock, and Water targets
Ice coverage	Glaceon	Answers Dragon, Flying, Ground, and Grass threats
Fairy coverage	Sylveon	Checks Dragon and Dark types with a strong special profile
Maximum damage, high risk	Nucleon	Nuclear STAB hits wide swaths of the dex, but dies fast

A practical tip: decide your target evolution before you start training. If you want Espeon, empty your party of Nuclear types at the very start of your Eevee's training arc, not at level 30. If you want Nucleon, keep the Leafeon, Glaceon, and Sylveon items in your bag rather than on your Eevee.

Breeding is also worth the time. Because Eevee's gender ratio skews heavily male (87.5%), you will need a female Eevee or a Ditto equivalent to pass down natures efficiently. Community reports suggest breeding for the nature you want is faster than soft-resetting a gift Eevee.

FAQ

How many Pokemon Uranium eeveelutions are there?

Nine. Eight are the classic forms — Vaporeon, Jolteon, Flareon, Espeon, Umbreon, Leafeon, Glaceon, and Sylveon — plus Nucleon, a Nuclear-type original to Uranium. Nucleon is the one that surprises most returning players.

Why did my Eevee evolve into Nucleon instead of Espeon?

Because of the priority system. Nucleon outranks the level-up evolutions, so any Nuclear-type Pokémon in your party or any evolution item left on your Eevee can push it down that path. Clear your party of Nuclear types and remove held items, then level up again.

How do I get a shiny Eevee in Pokemon Uranium?

The wiki records that a shiny Eevee was handed out as a New Year reward during Beta 4.0, which means some players already have one. For everyone else, community reports point to breeding and encounter hunting as the realistic routes, since the Venesi City gift is a one-time event.

Is Eevee worth using in Pokemon Uranium?

Yes, though mostly as a project. Its 325 base stat total is unimpressive on its own, and its Nuclear weakness is a real liability late in the game. Treat Eevee as a template: pick your target evolution early, train with the right nature and EVs, and you end up with a genuinely strong team member.

With nine Pokemon Uranium eeveelutions to choose from, the real skill is not catching Eevee — it is planning the evolution before the level-up screen surprises you. Grab the Venesi City gift, decide on your form, clear your party and held items accordingly, and you will get exactly the partner you wanted.