When does Chopper join the crew?

Tony Tony Chopper first joined the Straw Hat Pirates crew as their doctor in episode 90 of the anime, titled “Hiriluk’s Cherry Blossoms! Miracle of the Drum Rockies” and in chapter 153 of the One Piece manga, titled “Hiriluk’s Sakura”.

Chopper Joins the Crew!, English Dub

One Piece: 5 Other Crews Chopper Would Love To Join (& 5 He Would Hate)

TATE'S Comics + Toys + More Staff Pick of the Week: Banpresto One Piece Fluffy Puffy Chopper Flocked Figure

Tony To Nie Chopper : ONE PIECE FILM RED Ultimate Crew 4th Dodeka metal badge, Goods / Accessories

Who Is Chopper from 'One Piece' - Who is the Doctor Coming to Season 2?

One Piece: Every Crew Member of the Straw Hat Pirates

When does Chopper join the crew?

Who are the crew members in One Piece?

Tony Tony Chopper - Wikipedia

One Piece: 10 Times Chopper Saved The Day

I think that chopper got much much worse after the time skip. : r/OnePiece

One Piece Tonakai wa Aoppana! Chopper no Himitsu (TV Episode 2001) - IMDb

What order would you say each of the Straw Hats joined the crew? Would you say Nami or Usopp joined first? Why? What about Robin? Do you base it off of when