Tangrowth

The first thing people see when looking at Tangrowth are its huge base stats, with four out of its six base stats being over base 100, a rare sight to see in RU. Among those stats lie a high Defense and respectable offenses, which allow Tangrowth to function as an effective tank. The biggest boon to Tangrowth, however, is its ability, which allows it to regain one-third of its maximum health upon switching out, making it much harder to kill. To complement all that, Tangrowth gets access to Sleep Powder, which effectively lets it incapacitate a Pokemon for the rest of the battle. Unfortunately, the two stats that aren't up-to-par are those that burden it the most; a low Special Defense and Speed make it easy to kill with special attacks. Tangrowth also faces stiff competition from Amoonguss, which sports an actual Special Defense stat, the more accurate Spore, a better defensive typing, and the same Regenerator ability; Tangrowth's higher offenses lets it beat most setup sweepers even after sleep clause has been activated, though. The metagame has also prepared for sleep inducers, which lowers the impact of Tangrowth's main weapon: Sleep Powder.