Here's basically what Vaporeon can do for you:
Moveset 1: The Hazer
Vaporeon @ Leftovers
- Surf
- Ice Beam/Shadow Ball
- Haze
- Wish
Hazing Vaporeon for anyone who often uses stat boosts in battle. Vaporeon isn't exactly the best Pokemon for this, since it's Defense stat is not particularly good and Energy Ball/Thunderbolt will wreck your day on the Special side, but it's an option.
Moveset 2: The Sub-passer
Vaporeon @ Leftovers
- Surf
- Substitute
- Baton Pass
- Wish/Acid Armour
Vaporeon's HP stat is HUGE, so it can make some very powerful Substitutes. With Baton Pass, you can then pass these to other members of your team. Wish works well with Baton Pass since it lets you pass heals to your team-mates too, or you can pass Acid Armour boosts to your more fragile team members. Surf for a STAB attack.
Moveset 3: The Toxi-staller
Vaporeon @ Leftovers
- Surf
- Toxic
- Aqua Ring/Attract
- Wish/Rest
Stalling Vaporeon. Wear down opponents with Toxic and Surf, and use Aqua Ring and Wish/Rest to keep yourself alive. Attract is there as an option to stop the opponent from attacking you should they stay in, although most will switch out to stop Toxic from tearing them apart.
Moveset 4: The Special Sweeper
Vaporeon @ Choice Specs/Choice Scarf/Life Orb/Wise Glasses
- Surf
- Ice Beam
- Shadow Ball
- Hidden Power (Electric/Grass)
Ummmm...yeah. Well, Vaporeon DOES have 110 base Sp.Attack...and you could surprise someone with this. Surf for STAB, Ice Beam for Dragons, Shadow Ball for Psychic/Ghosts and HP Electric/Grass to hit Water-types. Electric is the better choice here since it takes out Empoleon and Gyarados. Vaporeon is very slow though, so sweeping isn't really its forte.
That's basically all the things that Vaporeon can do. Moveset 2 is my favourite, with Moveset 3 in second (although Umbreon is much better at Toxi-stalling,) Moveset 1 in third since there are a lot of better Hazers/PHazers out there (Weezing, Skarmory, Suicune etc.) and Moveset 4 last since it's a joke moveset really - there has to be at least 50 better Special Sweepers than Vaporeon out there.
Ummm...that's it. See what you think.