This is the largest repository. Search for "Martin Mystery" and filter by language (English). You will find packs for Season 1 and Season 2. Note: Episode numbering differs between French and English broadcasts, so you may need to rename the files.
Use a free tool like Subtitle Edit or Aegisub. martin mystery english subtitles
Martin Mystery is a French/Italian animated series produced by Marathon Media (the same studio behind Totally Spies!). Despite having a dedicated cult following, the show has suffered from inconsistent home media releases and digital preservation. This is the largest repository
The search for English subtitles is complicated by the fact that the show is hard-of-hearing accessible on major streaming platforms, but unsupported on physical media and pirated archives. This has created a fragmented landscape where high-quality subtitles exist but are often locked behind specific proprietary formats or geographical restrictions. Note: Episode numbering differs between French and English