22 & 32 are still unknown, though people believe 32 is the golden Tamagotchi which isn't released yet.
Souvenirs and where to get them:
1. Passport - When you enter TamaTown
2. Special key - Town hall
3. Key - Town Hall
4. Map -School
5. Textbook - School
6. Computer - School
7. Medal - School
8. Mobile phone - Parents
9. BMX Bike - Grandparents
10. Skis - Switzerland trip
11. Palm Tree - Hawaii trip
12. Surfboard - Australia trip
13. Panda - China trip
14. Maracas - Chile trip
15. Ring - King
16. Cape - King
17. Crown - King
18. Skateboard - Arcade
19. Balloon - Arcade
20. Baseball cap - Arcade
21. Teddy bear - Arcade
22. Unknown - Unknown
23. Rare CD - The Tama Beat
24. Shoes - Clothes shop
25. Movie poster 1 - Movie theater
26. Movie poster 2 - Movie theater
27. Movie poster 3 - Movie theater
28. Bandai Ribbon - Lucky Tama Toye
29. Microphone - The Tama Beat
30. Suit Case - Clothes shop
31. Trophy - Arcade
32. Golden Tamagotchi? - Lucky Tama Toys (Coming soon)