Do DS games save on the cartridge or console?

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Tags

1. #collected
2. #completed
3. #saved
4. #information
5. #physical
6. #itself
7. #levels
8. #streetpass
9. #cartridge
10. #nintendo
11. #progress
12. #items
13. #would
14. #memory
15. #while
16. #cards
17. #stored
18. #system
19. #spotpass