68 known values for trail with current usage counts:

1. default (28024× used)
2. fluff (9807× used)
3. yellow_dots (5997× used)
4. red (2800× used)
5. blue (1876× used)
6. paws (1514× used)
7. green (1485× used)
8. fire (1305× used)
9. rings (1303× used)
10. earth (1074× used)
11. ice (940× used)
12. arcade (923× used)
13. red_neon (840× used)
14. stardust (717× used)
15. flowers (601× used)
16. ice_dust (587× used)
17. blue_neon (572× used)
18. fire_dust (549× used)
19. sakura (522× used)
20. shadow_dust (485× used)
21. magic (394× used)
22. crimson (388× used)
23. autumn_leaves (384× used)
24. shadow_tail (346× used)
25. digital_3d (335× used)
26. fire_tail (311× used)
27. abstract_3d (294× used)
28. elements (287× used)
29. ice_tail (265× used)
30. magic_tail (246× used)
31. magic_dust (202× used)
32. wish (185× used)
33. black_and_white (90× used)
34. stars (72× used)
35. speedy (69× used)
36. tech_path (56× used)
37. pollution (53× used)
38. tracks (47× used)
39. leaves (42× used)
40. green_neon (42× used)
41. feathers (38× used)
42. siren (35× used)
43. red_dots (34× used)
44. snowflakes (33× used)
45. treasure_map (33× used)
46. zzzzz (31× used)
47. propulsion (30× used)
48. festive_tree (29× used)
49. pumpkins (28× used)
50. aaaaa (27× used)
51. twinkles (23× used)
52. dots_inc (21× used)
53. lunar_fireworks (21× used)
54. bubbles (15× used)
55. rainbow_light (11× used)
56. bomb_fuse (11× used)
57. lucky_trail (11× used)
58. blue_plasma (10× used)
59. rainbow_dots (9× used)
60. confetti (8× used)
61. money_trail (8× used)
62. ghost (8× used)
63. red_plasma (5× used)
64. spacewar (4× used)
65. meteorite (3× used)
66. gold (2× used)
67. gold_dust (2× used)
68. musical_notes (1× used)