Bionicle is, all things considered, is packed with originality. Its storyline centers around living robots that have elemental powers and live in a “tribal island” setting (for the first few years, at least). Eventually, it does go into a more sci-fi setting, but it still has a lot of original concepts. Especially the reveal of Mata Nui being a 40-million-foot-tall robot got.
However, not everything in Bionicle is truly original. I saw a YouTube comment pointing out that Web Of Shadows is a lot like Star Wars Episode III: both are the third installments of a rather infamous trilogy, both have a main hero being tempted to turn bad, both have a wise old guy with a walking stick, both have a side villain who exists to sell toys, and both have a close friend vs. close friend fight. Admittedly, the two movies aren’t exactly an equal comparison, but they do share some elements.
But if there’s anything else you can think of that Bionicle flat-out “stole” from another franchise, then write about it here.