There are several versions of the Ralsei Shimeji created by the fan community: Thelightsmen (DeviantArt):
Shimeji Ralsei UPD, a term that has been gaining traction in recent times, especially among fans of the popular rhythm game, Danganronpa, and the Shimeji series. For those who may not be familiar, Shimeji is a type of mushroom commonly used in Japanese cuisine, while Ralsei is a character from the Danganronpa series. The UPD in Shimeji Ralsei UPD stands for "Ultimate Powerful Dish," and it refers to a unique and intriguing concept that combines elements of food, gaming, and creativity. shimeji ralsei upd
This guide covers (both regular and hooded forms). There are several versions of the Ralsei Shimeji
He blinked. He stretched his tiny arms. Then he looked directly at your cursor. shimeji ralsei upd