Takes place between the events of Orange Town and Loguetown
Buggy runs into Gaimon & then reunites with his crew + teams up with Alvida
Adapted by the anime in ep 46/47 (between Arlong Park & Loguetown)
#01: Buggy's Crew Adventure Chronicles
✓ Adapted
ch35-75 = ep15-34
#02: Diary of Koby-Meppo
✓ Adapted
ch83-119 = ep38-73
Takes place between the events of Captain Morgan's defeat and Post-Enies Lobby
Koby and Helmeppo being recruited by Garp & training at Marine HQ
Adapted by the anime in ep 68/69 (between Whiskey Peak & Little Garden)
#03: Jango's Dance Paradise
ch126-172 = ep76-108
Takes place between the events of Baratie and Arabasta
#04: Hatchi's Sea-Floor Stroll
ch182-228 = ep112-148
Takes place between the events of Arlong Park and Sabaody
#05: Wapol's Omnivorous Hurrah
ch236-262 = ep152-172
Takes place between the events of Drum Island and 3D2Y (timeskip)
💡 Franky mentioned (during the Fish-Man Island battle) that he used Wapometal to build General Franky
#06: Ace's Great Blackbeard Search
ch272-305 = ep178-208
Takes place between the events of Jaya & Post-Enies Lobby
#07: Gedatsu's Accidental Blue-Sea Life
ch314-348 = ep217-245
Takes place between the events of Skypiea and 3D2Y (timeskip)
#08: Miss Goldenweek's "Operation: Meet Baroque Works"
ch359-413 = ep251-297
Takes place between the events of Arabasta & Impel Down
#09: Enel's Great Space Operations
ch428-474 = ep310-369
Takes place after the events of Skypiea...
⚠️ Recommended to read this instead, since the narrated version's translation is wrong at times
Also only the Imgur includes "Where They Are Now #1 – Skypiea"
#10: CP9's Independent Report
ch491-528 = ep386-425
Takes place between the events of Enies Lobby and Dressrosa
Only the Imgur includes "Where They Are Now #2 – Water 7"
#11-18: Straw Hat's Separation Serial
✓ Adapted
ch543-560 = ep445-469
Takes place between the events of Sabaody and Post-War
The other 8 Strawhats' shenanigans on their respective island, before they find out about the Summit War
Adapted by the anime in ep 418-421 (between Amazon Lily & Impel Down) and 453-456 (between Impel Down & Marineford)
#19: From the Decks of the World
ch613-668 = ep532-594
Takes place between the events of Fish-Man Island and Dressrosa
#20: Caribou's Kehihihihi in the New World
ch674-731 = ep600-663
Takes place after the events of Fish-Man Island...
#21: Solo Journey of Jinbe, Knight of the Sea
ch751-785 = ep687-728
Takes place after the events of Fish-Man Island...
#22: From the Decks of the World: post-Dressrosa
ch805-838 = ep754-800
Takes place after the events of Dressrosa...
⚠️ Can't read this one, since the chapter titles would spoil you (wait until after ep800 or watch narrated version)