Direct rip from the game files.
Enjoy.






1. MN9_BGM1
2. MN9_BGM1_8bit
3. MN9_BGM1_Intro
4. MN9_BGM1_INTRO_8bit
5. MN9_BGM2
6. MN9_BGM2_8bit
7. MN9_BGM2_Intro
8. MN9_BGM2_INTRO_8bit
9. MN9_BGM4
10. MN9_BGM4_8bit
11. MN9_BGM4_Intro
12. MN9_BGM4_INTRO_8bit
13. MN9_BGM6
14. MN9_BGM6_8bit
15. MN9_BGM6_Intro
16. MN9_BGM6_INTRO_8bit
17. MN9_BGM_BOSS
18. MN9_BGM_BOSS_8bit
19. MN9_BGM_BOSS_Defeat
20. MN9_BGM_BOSS_Defeat_8bit
21. MN9_BGM_BOSS_Intro
22. MN9_BGM_BOSS_Intro_8bit
23. MN9_BGM_BOSS_LP
24. MN9_BGM_BOSS_LP_8bit
25. MN9_BGM_Challenge
26. MN9_BGM_CHALLENGE_8bit
27. MN9_BGM_Challenge_INTRO
28. MN9_BGM_CHALLENGE_INTRO_8bit
29. MN9_BGM_Epilogue
30. MN9_BGM_Epilogue_8bit
31. MN9_BGM_Epilogue_INTRO
32. MN9_BGM_Epilogue_INTRO_8bit
33. MN9_BGM_ExMode
34. MN9_BGM_ExMode_8bit
35. MN9_BGM_ExMode_INTRO
36. MN9_BGM_ExMode_INTRO_8bit
37. MN9_BGM_MAP
38. MN9_BGM_MAP_8bit
39. MN9_BGM_MAP_Intro
40. MN9_BGM_MAP_INTRO_8bit
41. MN9_BGM_MENU
42. MN9_BGM_MENU_8bit
43. MN9_BGM_MENU_INTRO
44. MN9_BGM_MENU_INTRO_8bit
45. MN9_BGM_MENU_LP
46. MN9_BGM_MENU_LP_8bit
47. MN9_BGM_OPENING
48. MN9_BGM_OPENING_8bit
49. MN9_BGM_RAY_BOSS
50. MN9_BGM_RAY_BOSS_8bit
51. MN9_BGM_RAY_BOSS_8bit_INTRO
52. MN9_BGM_RAY_BOSS_Defeat
53. MN9_BGM_RAY_BOSS_Defeat_8bit
54. MN9_BGM_RAY_BOSS_Intro
55. MN9_BGM_RAY_THEME
56. MN9_BGM_RAY_THEME_8bit
57. MN9_BGM_RAY_THEME_Intro
58. MN9_BGM_RAY_THEME_INTRO_8bit
59. MN9_BGM_RAY_TUTORIAL
60. MN9_BGM_RAY_TUTORIAL_8bit
61. MN9_BGM_RAY_TUTORIAL_8bit_INTRO
62. MN9_BGM_RAY_TUTORIAL_INTRO
63. MN9_Main_Theme
64. MN9_Main_Theme_8bit
65. MN9_Mighty_StaffRollRemix


Link    #1: https://mega.nz/#!xswGwRTS!jNeIzbupgmObtlLIIi9OLuuDKdBTJS2yQXx5iozDBgk
Mirror #1: http://www.filedropper.com/mn9dost
Mirror #2: http://go4up.com/dl/f6b9b3b9af5a

Thanks for uploading! The Ray battle theme is cool, that thing with the guitar in the background is reminiscent of classic MegaMan somehow.