My lvl 100 empoleon named Duke.
I beat the whole sinnoh E4 usin him only.
either samurott. He's the best, and he's the first Pokémon I've ever gotten my entire life. (well, Oshawott is, but he evolved into Samurott)
I run a Drought Politoed as the setup king...and use whomever else is necessary for the water team afterward...
Mines also Swampert. My first Pokemon was a Mudkip. (But I deleted it because I was young when I got Sapphire )
As a tribute I got another Swampert and is now currently lv100 in one of best teams.
Simipour HM slave
royal the blastoise hydro pump ice beam focus blast mirror coat