Quagsire

While Quagsire may be adorable, it is also rather forgettable due to its low base stat total and inferiority to other bulky Water-types, most notably Swampert. Although admittedly flawed, Quagsire does sport access to Recover, Water Absorb, and Encore to differentiate itself from the oversized mudpuppy. These traits allow it to be one of the few hard counters to all variants of Starmie (which is no easy feat) while still faring decently well against Pokemon such as Metagross and Tyranitar. All in all, Quagsire's extremely niche options can allow it to function in standard; just make sure that what it's doing can't be done better by other Water-types.