Trevenant @ Sitrus Berry
Ability: Harvest
EVs: 252 SDef / 244 HP / 12 Atk
Careful Nature
- Curse
- Will-O-Wisp
- Substitute
- Phantom Force
This thing is stally. Phantom Force and Curse probably sound like gimmicks, but the set is effective. The initial idea was actually to spread burns around, but Trevenant actually just passively kills things.
Substitute is the go-to move after you switch it in and force something out. Trevenant doesn't really like status, with toxic probably being the worst (though it can still live quite a bit). Harvest-sitrus also means it can sub for a very long time.
Max SDef investment makes it quite bulky on the special side, and will-o-wisp takes care of most physical attackers.
Curse hits anything, and with harvest sitrus the HP can be healed quite quickly.
Phantom Force is great. It's essentially a protect on one turn, then a STAB attack on the second. This means 3 things:
1. Extra 25% damage done to opponent from curse.
2. Extra 12.5% damage done to opponent from WoW.
3. 50% chance to harvest a sitrus berry if you don't already have one.
Since curse + will-o-wisp forces a lot of switches, phantom force doesn't give as many "free set-up" turns if used correctly.
This set works well in sandstorm as well as sun. With sandstorm, the HP can actually gradually go down to 50% (so you're not stuck at 51% or something). It also adds to the passive damage, for a possible 43.75% damage in one turn.
Here's an example:
http://pokemonshowdown.com/replay/pokebankoubeta-61566526
The opponent is pretty bad (leech seed on a grass type what?) but it does show Trevenant's stalliness. I'll try to find better ones.
And this set has gotten me to high 1800's (peaked 1900's) so it can't be terrible.