>>10598883They're Pyonchitchi (boy, top) and Pyonkotchi (girl, bottom). They originated from the Osutchi and Mesutchi, the first "connecting" Tamagotchi, but were later made into recurring Connection-era characters. Pyonchitchi shows up in V2, Pyonkotchi V3, and both end up coming back together on the V4 as the perfect-care skill fail (Universal Family) characters that replaced Entama's secrets.
The Connections brought back a lot of Osutchi and Mesutchi characters as one-offs to keep the roster fresh, but those two were the only recurring ones of the bunch.