Sylveon #137: Sylveon
Pokémon
#139: Ratsy Ratsy
Click to see all images of Nucleon
Nucleon
Atomic Pokémon
#138
138Popkas.png

138Popkas.png

Type
Nuclear
Unknown
Unknown
Ability
Atomizate
Hidden Ability
Geiger Sense
Gender ratio
87.5% male, 12.5% female
Catch rate
45 (5.9%)
Breeding
Egg group
Field
Hatch time
9180 steps*
Height
0.7 m 2'3.6"
m
Weight
21.5 kg 47.4 lbs
{{{weight2-kg}}} kg
Base experience yield
184
Leveling rate
Medium Fast
EV yield
Total: 2
0
HP
0
Atk
0
Def
1
Sp.Atk
1
Sp.Def
0
Speed
0
HP
0
Atk
0
Def
0
Sp.Atk
0
Sp.Def
0
Speed
Body style
Quadruped
Footprint
File:F138.png
Pokédex color
Black
Base friendship
35
Cry


Nucleon (NUKE-lee-on) is a Nuclear-type Pokémon.

It evolves from Eevee starting at level 20 while the player has a Nuclear-type Pokémon in their party.

Pokédex entry

Pokédex entry
One of the only non-feral Nuclear Pokémon. It's theorized that its bond with its trainer when it was an Eevee allows it to stay in control.

Biology

Nucleon has a sleek gray body with four slender legs, each with a green three-toed paw. It has three light-blue eyes. Its muzzle and underbelly are white, and its tail and ears are slender green triangles detatched from its body. It has an ionising radiation symbol on its chest with three detatched green triangles, giving it the appearance of a bow-tie. Nucleon remembers the bond it had with its trainer and thus does not go feral upon evolution from an Eevee. The symbol on its chest can also fire out gamma rays which it defeats its opponents with. They are usually only found in urban areas under the care of trainers, though they can be occasionally seen roaming near irradiated landscape.

Game locations

Availability
None Evolve Eevee
Common
Uncommon
Fossil
Rare
Poké Radar
One

Held items

Held item(s)
None This Pokémon cannot be found holding an item.
Common
Uncommon
Rare
Always

Base stats

Stat Range
At Lv. 50 At Lv. 100
HP: 70
130 - 177 250 - 344
Attack: 55
54 - 117 103 - 229
Defense: 85
81 - 150 157 - 295
Sp.Atk: 115
108 - 183 211 - 361
Sp.Def: 115
108 - 183 211 - 361
Speed: 90
85 - 156 166 - 306
Total: 530   Other Pokémon with this total  
  • Minimum stats are calculated with 0 EVs, IVs of 0, and a hindering nature, if applicable.
  • Maximum stats are calculated with 252 EVs, IVs of 31, and a helpful nature, if applicable.


Type effectiveness

Under normal battle conditions, this Pokémon is:
Immune to:
Normal
Fighting
Flying
Poison
Ground
Rock
Bug
Ghost
Steel
Fire
Water
Grass
Electric
Psychic
Ice
Dragon
Dark
Fairy
Nuclear ½×
None
Doubly resistant to:
Normal
Fighting
Flying
Poison
Ground
Rock
Bug
Ghost
Steel
Fire
Water
Grass
Electric
Psychic
Ice
Dragon
Dark
Fairy
Nuclear ½×
None
Resistant to:
Normal
Fighting
Flying
Poison
Ground
Rock
Bug
Ghost
Steel
Fire
Water
Grass
Electric
Psychic
Ice
Dragon
Dark
Fairy
Nuclear ½×
None
Damaged normally by:
Normal
Fighting
Flying
Poison
Ground
Rock
Bug
Ghost
Steel
Fire
Water
Grass
Electric
Psychic
Ice
Dragon
Dark
Fairy
Nuclear ½×
None
Weak to:
Normal
Fighting
Flying
Poison
Ground
Rock
Bug
Ghost
Steel
Fire
Water
Grass
Electric
Psychic
Ice
Dragon
Dark
Fairy
Nuclear ½×
None
Doubly weak to:
Normal
Fighting
Flying
Poison
Ground
Rock
Bug
Ghost
Steel
Fire
Water
Grass
Electric
Psychic
Ice
Dragon
Dark
Fairy
Nuclear ½×
None

Moves

By leveling up

  • All damaging Normal-type moves become Nuclear-type if Nucleon has Atomizate.
By leveling up
 Level   Move   Type   Cat.   Pwr.   Acc.   PP 
1 Helping Hand Normal Status —% 20
1 Tackle Normal Physical 50 100% 35
1 Tail Whip Normal Status 100% 30
5 Sand Attack Ground Status 100% 15
9 Gamma Ray Nuclear Special 40 100% 30
12 Quick Attack Normal Physical 40 100% 30
17 Swift Normal Special 60 —% 20
21 Headbutt Normal Physical 70 100% 15
25 Half-Life Nuclear Special Varies 90% 10
29 Flash Normal Status 100% 20
33 Mirror Coat Psychic Special 100% 20
37 Conversion 2 Normal Status —% 20
41 Last Resort Normal Physical 140 100% 5
45 Hyper Voice Normal Special 90 100% 10
  • A level of "Start" indicates a move that will be known by a Nucleon obtained at level 1
  • Bold indicates a move that gets STAB when used by Nucleon
  • Italic indicates a move that gets STAB only when used by an evolution of Nucleon

Via a prior evolution

Via a prior evolution
 Stage   Move   Type   Cat.   Pwr.   Acc.   PP 
Eevee Baby-Doll Eyes Fairy Status 100% 30
Eevee Baton Pass Normal Status —% 40
Eevee Bite Dark Physical 60 100% 25
Eevee Charm Fairy Status 100% 20
Eevee Dig Ground Physical 80 100% 10
Eevee Double-Edge Normal Physical 120 100% 15
Eevee Echoed Voice Normal Special 40 100% 15
Eevee Growl Normal Status 100% 40
Eevee Refresh Normal Status —% 20
Eevee Retaliate Normal Physical 70 100% 5
Eevee Secret Power Normal Physical 70 100% 20
Eevee Shadow Ball Ghost Special 80 100% 15
Eevee Snore Normal Special 50 100% 20
Eevee Take Down Normal Physical 90 85% 20
Eevee Trump Card Normal Special Varies —% 5
  • Bold indicates a move that gets STAB when used by Nucleon
  • Italic indicates a move that gets STAB only when used by an evolution of Nucleon

By TM/HM

By TM/HM
 TM   Move   Type   Cat.   Pwr.   Acc.   PP 
TMPsychic.png TM04 Calm Mind Psychic Status 0000 00—}}—% 20
TMNormal.png TM05 Roar Normal Status 0000 00—}}—% 20
TMPoison.png TM06 Toxic Poison Status 0000 090}}90% 10
TMNormal.png TM10 Hidden Power Normal Special 06060 100}}100% 15
TMFire.png TM11 Sunny Day Fire Status 0000 00—}}—% 5
TMNormal.png TM15 Hyper Beam Normal Special 150150 090}}90% 5
TMPsychic.png TM16 Light Screen Psychic Status 0000 00—}}—% 30
TMNormal.png TM17 Protect Normal Status 0000 00—}}—% 10
TMWater.png TM18 Rain Dance Water Status 0000 00—}}—% 5
TMNormal.png TM20 Safeguard Normal Status 0000 00—}}—% 25
TMNormal.png TM21 Frustration Normal Physical 0000Varies 100}}100% 20
TMNormal.png TM27 Return Normal Physical 0000Varies 100}}100% 20
TMNormal.png TM32 Double Team Normal Status 0000 00—}}—% 15
TMPsychic.png TM33 Reflect Psychic Status 0000 00—}}—% 20
TMNormal.png TM42 Facade Normal Physical 07070 100}}100% 20
TMPsychic.png TM44 Rest Psychic Status 0000 00—}}—% 10
TMNormal.png TM45 Attract Normal Status 0000 100}}100% 15
TMNormal.png TM64 Explosion Normal Physical 250250 100}}100% 5
TMNormal.png TM68 Giga Impact Normal Physical 150150 090}}90% 5
TMNormal.png TM70 Flash Normal Status 0000 100}}100% 20
TMNormal.png TM82 Sleep Talk Normal Status 0000 00—}}—% 10
TMNormal.png TM87 Swagger Normal Status 0000 090}}90% 15
TMNormal.png TM90 Substitute Normal Status 0000 00—}}—% 10
TMNormal.png TM98 Last Resort Normal Physical 140140 100}}100% 5
  • Bold indicates a move that gets STAB when used by Nucleon
  • Italic indicates a move that gets STAB only when used by an evolution of Nucleon

By tutoring

By Move Tutor
 Move   Type   Cat.   Pwr.   Acc.   PP   Cost 
Covet Normal Physical 60 100% 25 Red Shard4
Helping Hand Normal Status —% 20 Yellow Shard4 /PokémonDollar.png0
Hyper Voice Normal Special 90 100% 10 Blue Shard4
  • Bold indicates a move that gets STAB when used by Nucleon
  • Italic indicates a move that gets STAB only when used by an evolution of Nucleon

By breeding

By breeding
 Father   Move   Type   Cat.   Pwr.   Acc.   PP 
DunsparceFelengEkansJerbolta
CostrawFlagerChimicalMinicorn
Captivate Normal Status 100% 20
OrchynxChyinmunkFelengOwten
JerboltaEeveePufluffMinicorn
Charm Fairy Status 100% 20
FelengMankeyEevee Covet Normal Status 60 100% 25
Chimical Curse Ghost Status —% 10
LunapupHerolune Detect Fighting Status —% 5
GrozardDunsparceJerboltaLunapup
Alpico
Endure Normal Status —% 10
N/A Fake Tears Dark Status 100% 20
DunsparcePufluff Flail Normal Physical Varies 100% 15
DunsparceEkansJerboltaTikiki Natural Gift Normal Physical Varies 100% 15
Ratsy Stored Power Psychic Special 20 100% 10
Ratsy Synchronoise Psychic Special 120 100% 15
Ratsy Tickle Normal Status 100% 20
Ratsy Wish Normal Status —% 10
DunsparceFeleng Yawn Normal Status —% 10
  • Moves marked with an asterisk (*) must be chain bred onto Nucleon
  • Bold indicates a move that gets STAB when used by Nucleon
  • Italic indicates a move that gets STAB only when used by an evolution of Nucleon

Evolution

129.png
Unevolved
Eevee
 Normal 
Rare Candy + Nuclear (type)
Level 20 or over with
a Nuclear-type party member

138.png
First evolution
Nucleon
 Nuclear 


Sprites

Front Back
GenderM.png 138.png 138b.png
Front shiny Back shiny
GenderM.png 138s.png 138sb.png


Gallery


Trivia

  • Prior to 1.2.3, Nucleon used Glaceon's cry.
  • Nucleon does not share the same stat spread or base stat total with the other Eeveelutions. It has a base stat total of 530 (as opposed to 525), and its stat spread is 70/55/85/115/115/90 (as opposed to some combination of 60/65/65/95/110/130).
  • Nucleon has the highest base Special Defense of all naturally Nuclear-type Pokémon.
  • Nucleon is the first Nuclear Pokémon listed in the PokéDex, as Nuclear forms are not listed.
    • Ironically, it is impossible for Nucleon to be the first Nuclear Pokémon a player has interacted with besides trading - Theo only acquires one after Vinoville Town, and the player cannot have a Nucleon without first catching another Nuclear Pokémon themselves.
    • Nucleon is also the only Nuclear-type capable of having its Hidden Ability.
  • Evolving into Nucleon will override all of Eevee's other level up-based evolutions, meaning that the player must remove any Nuclear Pokémon from their team before Eevee can evolve into Espeon, Umbreon, Glaceon, Leafeon, or Sylveon. Alternatively, Eevee can be evolved into those Pokémon before level 20.

Design origin

According to Motofumi Fujiwara, a key person at Game Freak, Eevee was based on a vague childhood experience he had, He described seeing an "indefinable creature" and that Eevee was based on a drawing of all that he could remember of it.

Each one of Eevee's evolutions are based on the same design but are made to resemble their type. Nucleon has a third eye on its forehead, a characteristic mutants are often depicted with in fiction.

Name origin

Nucleon comes from nuclear, nucleus (the center of an atom), or nucleon (one of the particles found in the nucleus) as well as Eon (an immeasurably long period of time, presumably in reference to the concept of evolution). Eon is also a suffix shared by all Eeveelutions and was Eevee's prototype English name.

Eevee
Eevee
Vaporeon
Vaporeon
Jolteon
Jolteon
Flareon
Flareon
Espeon
Espeon
Umbreon
Umbreon
Leafeon
Leafeon
Glaceon
Glaceon
Sylveon
Sylveon
Nucleon
Nucleon
Sylveon #137: Sylveon
Pokémon
#139: Ratsy Ratsy
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