Some of these stories are ones that are already out.  Others are not out but have been revealed.

1. Partners In Crime
2. Echo
3. Super Mario Eevee Bros.
4. The Legend Of the Elemental Wolves
5. Turbo Speed
6. Shattered Inside
7. EEeEE
8. Demon Eyes
9. The Starter Squad
10. Pikic
11. Land of the forgotten Pokémon
12. Angel of Darkness
13. Ghost
14. Lightning and the Thunder (already thinking of doing a sequel of Super Mario Eevee  Bros. With maybe just Lightning and Luigi)
15. Tempestuous
16. Uncontrollable
17. The world between us
18. Wish upon a Star
19. Pokemario
20. Misery
21. Outcast
22. Sequel to Partners in crime (title won't be revealed yet)
23. Sequel to Echo (Hearing Echoes)
24. Imagine that
25. The rise of Yveltal (an ultimate crossover)
26.The Story Of King Boo (the origins of Luigi's enemy)
27. Dark Heart
28. Out of the woods
29. Nullified
30. Gotta catch em all
31. Nyx
32. The Misfit Squad
33. The Pokémon Whisperer
34. Press START
35. Legends never die
36. Faith the Eevee Book 1
37. Faith the Eevee Book 2 The Last Hope
38. Faith the Eevee Book 3 Darkest Hour
39. Faith the Eevee Book 4 finale The final dream
40. Sino Faith the Eevee prequel
41. Missing
42. Battle Scars
43. A Rockruff's Tail
44. Toxic
45. Super Mario Fanfiction: The adventures of Princess Aline (yeah I'm making a story with my Mario brothers OC)
46. Fighters book series Fighters Book 1: Call Of the wild remake( don't know how many books I'll make but yeah)
47. The Ghost Cat Of Black Forest Avenue (I was so close to calling it Evershade Valley until a I realized that was from Luigi's Mansion Dark Moon)
48. Clash of the Elements
49. Swift
50. The Eevee Squad Book 1
51. The Eevee Squad Book 2
53. The Eevee Squad Book 3
54. The Eevee Squad Book 4
55. The Eevee Squad Book 5 (wow I think ahead)
56. My Pokémon Journey through Kanto
56. Through Johto
57. Through Hoenn
58. Through Sinnoh
59. Through Unova
60. Through Kalos
61. Through Alola
62. Through [Whatever gen 8 will be called]
63. The Life Of a Little Litten (no it's not about LittleLitten. It's about Ash's Litten with his Stoutland friend or caretaker)
64. Glitched
65. I am a Pokémon? remake
66. Undertale/ Mario Crossover (yeah it just came to me)
67. Five Nights at Luigi's (I don't know what to do with this yet but yeah)
68. EEeEE Returns (sequel to EEeEE) I don't know about this one yet)
69. Umbreon's Mansion (the Pokémon Version of Luigi's Mansion) *I haven't decided if the Umbreon should be Luigi or someone else but it is just like Luigi's Mansion so maybe)
70. Fighters: Frozen love
71.Fighters: Nightmares
72.Fighters: Wild and Free
73.Fighters: Mariah's Past
74.Fighters Omen Of Blood: Revenge Of Varg
75.Fighters: Omen Of Blood Cursed
76.fighters omen of blood: Only Dakrness
77.Fighters the Dark Age
78.Fighters Omen Of Blood: Blood Rivers
79. The Journey
80.When Sparks Fly
81. Spirit of the Night
82. Darkness and Shadows
83. Broken Promises
84. The Haunted
85. No longer lonely (A Mimikyu fanfic)
86. Luigi, The Friendly Ghost (ever since that Nintendo Direct I wanted to make a story about Luigi being a ghost)
87. What if King Boo was actually smart in Luigi's Mansion? (Just a random story about what would happen if King Boo actually was smart and managed to catch Luigi)
88. The Princess and The Plumber

Well at first I thought it would be over 90 story ideas I had but this is still a lot. However I still feel like I'm missing some. Anyways, Tell me which stories you'd like to see from this list that are not out yet. You can also ask me what they'd be about, I might make a short discription about them.