Lileep

Lileep is arguably one of the best Water-type checks in LC. It has access to Storm Drain, a very handy tool that lets it absorb Water-type moves and boost its already decent Special Attack by one stage; this allows it to check the majority of Water-types in the tier, such as Chinchou, Mareanie, Tirtouga, and Corphish. It also sports impressive natural bulk that is further boosted by Eviolite, which lets it switch in on moves that are weak or resisted with ease. Furthermore, it has access to Stealth Rock, which is very useful for weakening the opposing team, and Lileep can easily set it up thanks to its bulk and its ability. On top of that, Giga Drain and Recover grant it solid forms of recovery and the ability to stay around for much longer. However, like most defensive Pokemon, Lileep has poor Speed, meaning that it will almost always take a hit before moving, and despite its decent Special Attack, it suffers from mediocre damage output, even after a Storm Drain boost. While it has impressive bulk, its typing leaves it weak to common Steel-, Fighting-, and Ice-type moves, with that last weakness being quite a nuisance because almost any Water-type that Lileep checks tends to carry Ice Beam. Finally, its tanking abilities are severely hindered by both Knock Off and Toxic.