These are the two Hong Kong special edition Tamagotchi toys from 1997.
The one on the left is the more commonly known unit, which was produced to celebrate Hong Kong’s transfer of sovereignty from the United Kingdom in 1997.
The one on the right is the less commonly-known one. It was produced to celebrate 20 years of Bandai’s Hong Kong branch, and was a generation 2 unit. It also had a special Bandai logo background, which was significant because it was the only P1 or P2 unit ever produced to deviate from the default backgrounds.