Eriitchi is either pink or blue depending on gender, but in their artwork and in My Tamagotchi Forever, they are yellow. They have blushing cheeks and fluff on either side of their head. They wear blue pajamas with white polka-dots.
Eriitchi evolves from any child stage with 3-5 care mistakes and 20 or more happiness points when they evolve.
My Tamagotchi Forever
Eriitchi evolves from any child stage when fed mostly sweets.