Ok, here goes a complete list
1. 1996/1997 Generation 1 Transparent Blue
2. 1996/1997 Generation 1 Pink and Green
3. 1997(?) Generation 2 - Transparent Yellow
4. 1997(?) Generation 2 - White and Browny-Grey
5. Tamagotchi Connection - Orange and Purple
6. Tamagotchi Connexion Version 2 - Red and White
7. Tamagotchi Connection Version 3 - "Green Lillies"
8. Tamagotchi KeiTai Akai - Grey with Graffitti-esque writing
9. Chou Jinsei Enjoi EnTama - Yellow and Green
10. Chou Jinsei Enjoi EnTama CYOI Change Edition - Pink and Red
11. Ura Jinsei Enjoi UraTama - Turquoise and Green and Pink
12. Ura Jinsei Enjoi UraTama - White with Yellow, Blue and Green stars
13. Jinsei Tamagotchi Connexion Version 4 - "Blue Sky"
14. Jinsei Tamagotchi Connexion Version 4 - White with Red and Blue squares
and 1 silver Tamagotchi Angel on its way!