The following is a chart compiled from information posted in the Project Zone:
It shows one of the three poses that the teen and adult characters on the V4 tamagotchi appear as when the C button is pushed. It is also how the adult tamagotchi characters appear when they use the mirror item in their Item list.

Thank you che_rish for all your hard work in compiling this chart and to all members who contributed to this topic.
GK1
From the Tama Zone archive: original topic