Pichugender is a xenogender that is connected to the Pokémon Pichu or a gender that is defined as "a small gender that feels fuzzy with a small electric charge".
Pishinychu is the shinygender variant for pichugender, other terms for this gender include pichushinygender, shinypichugender, shinypigenderchu & pishinygenderchu.
The term appears to have been coined sometime before January 27th, 2019 by tumblr user "chibiusapositivity".
The original Pichugender flag was created by tumblr user "chibiusapositivity" when the term was coined.
The Pishinychu flag was created by tumblr user "imoga-pride" on January 27th, 2019.
An alternate Pichugender flag was created by twitter user "puppypawty" on February 3rd, 2021.