Manaphy @ Leftovers
Ability: Hydration
EVs: 96 HP / 252 SpA / 160 Spe
Modest Nature
- Tail Glow
- Rain Dance
- Scald
- Ice Beam
While Serperior and Char-X are powerful in their own rights, they are both incredibly susceptible to status from things they cannot immediately break, such as Heatran and Unaware Clefable. Furthermore, it takes a lot of effort and risk to break walls with them, for fear of even more status and being too worn down to continue the sweep. TG + RD Manaphy is a good status absorber that can take care of things like Chansey more efficiently than Serperior, and can nab the 2HKO on Unaware Clefable 70% of the time without SR. It also threatens out virtually every Heatran set (doesn't even get OHKOed by Solarbeam!) and is a far more robust check to Dragons like Latios and M-Altaria than a good majority of offensive Water-types in OU.