Hohotchi is a costume character on the Tamagotchi Connection Version 3. Any Tamagotchi can wear the Hohotchi costume regardless of whether it's male or female. To get the costume, you must first give the shopkeeper all 7 secret codes. The 7th code you give the shopkeeper will not yield the item that would normally be given out, but the "Costume" item instead. If you put the Costume on a Tamagotchi, it will turn into Hohotchi and continue to wear it until it goes to sleep.
Hohotchi appears to wear some sort of mask covering its upper face, and its right ear is slightly longer than the left ear. Hohotochi somewhat resembles an owl.