Vaporeon, The Bubble Jet Pokémon. Lives close to water. Its long tail is ridged with a fin which is often mistaken for a mermaid's. Its cell structure is similar to water molecules. It will melt away and become invisible in water. Found quietly resting by lake shores. Its cell structure is similar to water, so it can invisibly melt into water. When it's fins begin to vibrate, it is a sign that rain will come within a few hours. It prefers beautiful shores. With cells similar to water molecules, it could melt in water. As it uses the fins on the tip of its tail to swim, it blends with the water perfectly. It underwent a spontaneous mutation and grew fins and gills that allow it to live underwater. It has the ability to freely control water. .

Battle Moveset

A Good Moveset for Vaporeon would have to be this:

Attacks:

Surf
Ice Beam/Toxic
Haze
Rest/Wish

Items Attached:

Leftovers

Preferred Trait:

Water Absorb

Preferred Nature:

Calm

Strategy Using Vaporeon

This is the generic standard for a competitive Vaporeon. It's pretty effective at hazing away a Suicune's Calm Minds and it can usually take a Dragon Danced hit from Salamence or Tyranitar.

Vaporeon takes a little bit of prediction to use. You need to be sure when to switch in and when not to. It can take advantage of Suicunes on the offensive as well as sweeping Starmies and return up to 25% of its HP, as well as getting what is effectively a free switch in.

Rest or Wish is up to you. If you have a cleric on your team, Rest could be a favourable choice since Heal Bell/Aromatherapy would negate the sleep. Wish is more favourable if you have a Choice-Bander on your team, since said Choice Bander would be unable to replenish its own HP effectively. It's also favourable if you have sweepers on your team who have no recovery move.

Toxic remains as an option for making Blisseys waste Heal Bells and forcing Suicunes into sleep, however make sure not to poison a sweeper (especially one with guts), since you want to leave them without a status so that you can Paralyse or Burn them.

Other Optional Sets:

The Baton Passer:

@Leftovers
Substitute
Baton Pass
Wish/Acid Armour/Curse
Surf

Like all the Eeveelutions, Vaporeon can Baton Pass. Vaporeon's area of strength is HP, and the ability to Baton Pass 101 Subs (Substitutes that can take two Seismic Tosses/Night Shades). This would favourable to something with Focus Punch or a Pokémon intended to stat up itself.

Baton Passing Acid Armour is an option which links nicely with the tank-like passing that Substitute brings. It'd be favourable to something with a good Special Defence.

Curse is also an option, giving a minor boost to Attack an Defence to the receiving Pokémon however hurting its Speed. Most Pokémon this would favour already have the move Curse, however this strategy is favourable towards a physical attacker with low speed.

2v2 Vaporeon:

@Leftovers
Waterfall/Hydro Pump
Rain Dance/Swagger
Rest
Helping Hand

Vaporeon could aid a fellow Pokémon in a 2v2 battle pretty effectively. Rain Dance would aid something like Kingdra or Ludicolo, who have abilities special designed around Rain Dance. On the another hand, it could aid a physical sweeper with Swagger. The strategy requires Vaporeon's partner to set up a Substitute, which will block the effect of Confusion from Swagger but still give the Attack Boost. In 2v2 battles, since Surf's power is cut, Hydro Pump or Waterfall are the favourable attacks.

(I'd also like to note that in a 2v2 Battle, Vaporeon's partner could replenish Vaporeon's HP and vicar-versa if Vaporeon was teamed with a Water Absorb Pokémon.)

The Sweeper:

@Petaya Berry/Mystic Water

Surf
Bite/Haze/Hidden Power [Special]
Ice Beam
Rain Dance

This set is more favourable for an In-game Vaporeon. Haze is an option to counter Evasion moves. Ice Beam and Surf are your generic offensive moves, with Rain Dance giving a small boost to your Surfs.

EV Corner:

Metagame:
{Calm [+Special Defence, -Attack]} - 252 HP / 176 Defence / 82 Special Defence.

This is my favoured distribution for Vaporeon, giving it a sturdy 200 Defence and 270 Special Defence while maintain maximum HP, and in turn, maximum leftover recovery (29 HP per turn).

It's optional to put some EVs in Special Attack but it's enough to score an approximate one-hit-KO on Salamence (with Ice Beam) and an average two-hit-KO on Tyranitar (with Surf). If there are other Pokémon you want to be able to KO then the EVs need a little rethinking, but for the generic OU Metagame Vaporeon's Base Special Attack should be enough. After all, it's a Sponge and its number one priority is to absorb damage, not dish it out.

Link Battle/Battle Tower:

252 HP / 129 Defence / 129 Special Defence

It'd be preferable to have a Bold or Calm nature, but it's difficult to obtain the perfect natures. Once more, you'll probably want to consider tweaking the EVs to include some Special Attack, considering off the Metagame Vaporeon isn't there simply to counter Dragon Dancers, but like I mentioned previously, you want it to absorb attacks, not dish them out.

Strategy Against Vaporeon

Much of Vaporeon's effectiveness lies in its HP and its ability to regain HP

Predict switches - If it's glaringly obvious that your opponent will switch to Vaporeon while you use Surf, then don't use Surf. On the other hand, if you're suspicious of your opponents tactics, then figure out what they're planning. You have to remember that your opponent can use your own prediction against you and bluff that they'll switch to Vaporeon.

Don't attack it with a type weak to Water or Ice attacks - You don't need to worry about Hidden Powers, since Vaporeon doesn't have the power to pull off a successful super effective Hidden Power (4x weaknesses are an exception). If you don't need to worry about taking a super effective from either of its two main attacks and you have a decent Special Defence, Vaporeon should give you no direct problems.

Taunt or Trap it - Pretty much the only way to stop it from passing Wish to its fellow team-mates. Umbreon can do both and absorb Vaporeon's attacks pretty effectively.

Trace/Water Absorb - If you have a Pokémon with trace on your team and it's glaringly obvious that Vaporeon will use Surf, switch in and take advantage of that 25% Health return. Since all Pokémon with Trace have access to Thunderbolt, once you switch in the chances are you'll force Vaporeon out, giving you a free turn. Also, if you have a Water Absorber of your own, you can take advantage of Vaporeon's Surfs in much the way Vaporeon can take advantage of your own.

Vaporeon's type-weaknesses are minimal and both lie in its "Better-Than-Average" Special Defence. These are Electric and Grass. Electric typed attacks are your best bet, since the strongest (non-Solarbeam) Grass attack is Base 70, and that's Leaf Blade or Hidden Power.

Contest Moveset

A good Contest Moveset for Vaporeon would have to be this for the Beauty Contest best with Modest, Mild, Rash or Quiet Nature:

Attacks:

Rain dance
Surf
Hail
Ice beam

Items Attached:

Blue Scarf

Strategy Using Vaporeon

If you do the attacks in this following order you should have very few problems; 1st - Rain dance, 2nd - Surf, 3rd - Hail, 4th - Ice beam, 5th - Surf

Locations in Games

Ruby/Sapphire/Emerald Trade from FR/LG Colosseum Trade from FR/LG Fire Red/Leaf Green Evolve Eevee

Animé Appearences

Jolteon has had a few Animé Appearences. First it was owned by one of the Eevee brothers. After that, Ash battled one in the Pokemon League Entrance Exam. After that one of the Kimono Sisters in Ecruteak City had one. The Rest are Cameos Episode 040: The Battling Eevee Bros! Episode 056: The Ultimate Test! Episode 185: Trouble's Brewing! Episode 228: Espeon Not Included!