Well, I found a new love for this guy, seeing what he can do with all his bulk and powar. This is what I have found to be one of his best rain sets for OU.
Shaymin @ Life Orb
Trait: Natural Cure
EVs: 232 HP / 252 SAtk / 24 Spd
- Seed Flare
- Hidden Power [Ice]
- Earth Power
Hard times with Rotom-W ruining your rain teams all the time? Tired of using the same old stuff? Well, Shaymin approves of being the new member in your team. This guy is amazing, being able to absorb any statuses, Rest it off, and come back with full HP and completely healthy, thanks to Natural Cure. Seed Flare it STAB, and just a great move in general. Being able to OHKO anything weak to it, Shaymin is a force that should not be taken lightly. Hell, here's some proof on how much this little thing can do to one of the most bulky Pokemons around...
252SpAtk Life Orb Shaymin (+SAtk) Seed Flare in Sand vs 252HP/252SpDef Leftovers Tyranitar (+SpDef): 55% - 65% (224 - 266 HP). Guaranteed 2HKO. <--- Scary stuff
HP Ice the replacement of HP Fire, since we're in rain, and thus weakening our (inb4 pun) fire power.Being able to hit stuff like Thunderus-T, Dragonite/Salamence, Lati@s, who all resist our STAB and are immune to our other coverage move, HP Ice falls in perfectly and lets you destroy them while the opponent tries to set up or send a hit your way, which with this EV spread, you can take with some ease. Finally, we come down to Earth Power, which helps use take down scary Fire types, and hurt steel types like no one's business.
In conclusion, this guy is amazing, though walled by Blissey/Chansey, and a bit too slow for the OU enviornment. Thunder Wave support and a physical sweeper are of most help to this fella, and let's him show full potential.