Serplant (Japanese: リーフィス / Leafis) is a dual-type Grass/Water Pokémon, and is one of the original Fakemon created for Pokémon Altair, Sirius and Vega.
Thanks to its typing, abilities and defenses, Serplant is one of the best bulky Pokémon in Vega. It learns a lot of support moves to cripple opponents and help teammates such as Thunder Wave, Leech Seed, Toxic, Amnesia and Baton Pass. With its' Natural Cure ability, Serplant can abuse Rest without having to stay asleep when switched out while Serplant can also pass the status buffs to another Pokémon with Baton Pass.
80 Speed is pretty decent for a bulky wall like Serplant, considering most walls like it are really slow. Said Speed is also useful for Shell Smash, which can turn its decent Special Attack of 85 into something dangerous enough to wipe teams. Aside from a variety of support moves, Serplant can learn a variety of offensive moves to cover its weaknesses such as Raze Earth and Frostbite alongside STAB moves like Hydro Pump and Rapid Growth.
If you're looking for a Pokémon who is both diverse and flexible, Serplant is the one you should use. I highly recommend it if you're looking for a solid Water or Grass Pokémon to fit on your team.