Walrein

Walrein distinguishes itself as a Water-type with a balance of bulk and offensive presence that allows it to serve as a check to threats such as Scyther, Gligar, Omastar, Arcanine, and Nidoqueen. Its secondary Ice typing gives it an offensive edge over other Water-types such as Blastoise, as it offers Walrein an Ice Beam that threatens Vileplume and Cradily while scoring notable KOs on important targets such as Scyther. Moreover, unlike its main competitor Lapras, Walrein retains a key resistance to Fire- thanks to its ability Thick Fat, making it more reliable against Arcanine.

In spite of these attributes, Walrein faces stiff competition from other Water-types that offer appealing utility in the form of Rapid Spin or Heal Bell such as Tentacruel, Blastoise, and most importantly Lapras, which on top of not being as susceptible to Toxic also tends to be more immediately threatening thanks to its access to Hydro Pump and Thunderbolt. Moreover, while Walrein is not a slouch offensively, it fails to effectively threaten some of the bulkiest Pokemon around, such as Kangaskhan and the aforementioned Lapras.