Hyottokotchi is based on a Hyottoko, which is a Japanese mask. Hyottoko masks usually have different eye sizes between left and right and a scarf around his head, usually with blue polka-dots. Hyottoko's mouths are often supposed to look like it's blowing on fire with a bamboo pipe.
On Virtual Pets
Ura Jinsei Enjoy Tamagotchi Plus
Hyottokotchi evolves from Ura Mametchi. First, Ura Mametchi must have at least 200 Humor points before applying for a job. Ura Mametchi must get the highest-offered job, and then reach 999 Humor points within three days.
Tamagotchi Connection Version 4.5
Hyottokotchi evolves from Ura Mametchi if he has 450+ skill points and over 350 in Funny/Humor before the first Matchmaker visit. His favorite food is pasta.