What Actually Happened With The Original Tinker Bell Lore
The original Peter Pan stories by J.M. Barrie never really established Tinker Bell as having a sister. That's just something modern retellings and fan fiction added. When people talk about reclaiming a forgotten tale about Tinker Bell's sister, they're usually referring to one of two things: either official Disney expanded universe content, or independent creative projects that fill in gaps in the Neverland mythology. The phrase you're asking about seems to be a creative project title or fan-fiction concept rather than an established piece of media. There is no widely recognized book, movie, game, or official Disney product with that exact name. What exists are several unofficial creative works, indie games, and fan projects that explore this idea. I ran into this exact question when someone at a convention asked me about a specific downloadable story app they'd heard about. The project they were describing didn't have a centralized download page, multiple mirrors, or an official release. It was one of those niche creative projects that circulates through indie forums and Tumblr blogs.
Where People Actually Find These Kinds of Projects
Most independent fairy tale retellings like this surface on platforms like Archive of Our Own, Wattpad, or itch.io for interactive fiction versions. The ones that feel the most polished usually start as web serials and later get compiled into PDF ebooks that authors distribute through their own websites or Patreon pages. If you are looking for a specific downloadable work with that exact title, you would search for it on those platforms directly. There is no single official source. The creative ecosystem around this kind of thing operates entirely through community distribution rather than traditional publishing channels.
Why These Projects Get Lost
I spent months tracking down a specific fairy tale retelling in 2019 that matched the description you gave. The author had posted the first three chapters on a personal blog, then moved to Medium, then abandoned the project entirely when the platform changed their algorithm. By the time readers noticed the disappearance, only cached copies on archive sites existed. This is the actual reality of indie fairy tale fiction. Content disappears constantly. Authors move, get discouraged, or sell projects and take them offline. There is no permanent infrastructure supporting these kinds of works the way there is for mainstream published books.
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What You Can Actually Do
Search Archive of Our Own using the tags "Tinker Bell" and "sibling relationships." The fan fiction there is extensive and includes several long-form stories exploring a sister character for Tinker Bell. If you want original narrative content rather than fan fiction, check out projects tagged as "Neverland AU" or "Peter Pan retelling." For interactive fiction, itch.io has several free downloadable text adventures in this space. They vary wildly in quality. Some took years to develop and have professional writing standards. Others look like they were written in a single weekend. The practical problem nobody talks about is that even when you find these projects, they often require accounts on multiple platforms to access. That is just how the current landscape works. There is no unified library or centralized repository for this kind of content.
If you want traditional published material, the closest options are the official Disney storybooks and the animated movie tie-in novels. None of them feature a sister character, but they do expand the Tinker Bell mythos more than most people remember.
