Sjwhale has the highest base HP stat of all non-legendary Psychic-type Pokémon.
Ironically, even though this Pokemon has Rivalry, which references an insane feminist's hate for men, Rivalry actually does more damage on Pokémon of the same gender, and less damage on those of the opposite gender.
At one point in development, it had a counterpart named Gamergator.
Sjwhale is based on a small whale with genders for eyes, and it also resembles the female sign (ironically colored blue). The design may reference how many "social justice warriors" are described as "landwhales" (derogatory slang for the overweight). Much like Fishnism, it may be a literal interpretation of the triggerfish. It itself is shaped like the female sign too.
Sjwhale evolving from Fishnism may be a reference to some canon Pokemon like the Magikarp and Remoraid evolution lines undergo a completely different design upon evolving.
Sjwhale is a combination of SJW (social justice warrior), whale and possibly landwhale. It may also evoke shemale.