Lego's "biggest failure" was a 2002 line of toys called Galidor: Defenders of the Outer Dimension. The distinctive gimmick was the characters' abilities to "glinch" - i.e. remotely copy or switch out limbs between people. I never even saw the brand in stores, but discovered it through a shockwave flash game on the main Galidor webpage. I really want to play it again - think I might've archive.org'd it a few years ago and managed to get it to run? But anyway, it was fun and unusual - a top-down adventure game where you could jump, up towards the camera. The only part I remember is running into the main village, which was full of strange and mysterious shit locked behind walls demanding objects I didn't recognize, and screwing around with the challenges and games there - some sort of red crystal you earned by throwing a ball into a hoop - it was called "quoran" or something. Anyway, I never grasped it enough to get out of the village or glinch even once, but it still made enough of an impact on me to float into my mind when I woke up this morning.
https://www.youtube.com/watch?v=_053vJUrlug I was unfamiliar with the show until I watched it today. It's awful of course (in turns pitifully or hilariously awful) (the super unlikable main character's last name is "Bluetooth" and the comparatively awesome girl sidekick is "Allegra Zane") but also very entertaining if you like bizarrely-shot early 00s techno-futuristic dumb-goggles gel-and-rubber CGI fuckery. It starts off with a dream sequence on an alien planet but then the unusual, claustrophobic camera angles persist after waking and through the rest of the show - unintentional but imo it works out in its favor, gives the whole show an unnatural frantic cast that makes it stick out from the other 00s kid sci-fi - as though it never stopped being a dream. The weird thing is how this line got a ton of funding - enough to make a TV show, GBA game (I haven't checked it out, it probably sucks), the web game, a shitload of toys with expensive gimmicks, possibly other things. Then it turned out nobody but a small handful of crazies liked anything about it and the whole thing was quietly dumped in a ditch for Lego to turn to the much more successful Bionicle. Now it stands as a sort of impossible object - a line of toys nobody liked that got enough funding to build an entire dead-end ecosystem. If you search up "Galidor" today you find maybe two sacks like me who enjoy its awkward aesthetic and then a ton of threads and blogs listing LEGOS BIGGEST EPIC FAILS!!!!! #1, GALIDOR. The main reason cited for its failure is always its incompatibility with other Lego sets - of course, I never knew it had anything to do with Lego, so I never had that expectation.
edit: Oh, okay - It was called
Galidor Quest and it's actually still
"perfectly playable"/has some modicum of fans remaining who are interested in seeing what they can do to repair the broken save functionality - unfortunately old Shockwave games are basically impossible to decompile, to this day, for some reason, and I don't actually have the best flash version to get it to run so I can't go back and update you all on what the red crystals were actually called. But it's quite good to know that arrogant site filled with flash games will always remain in some capacity for us humans to observe its doomed confidence, and maybe learn something from it.
edit2: Do you guys remember that freakish 90s show Ragnar or somebody posted with the unspeakable CGI effects of a teenage girl transforming into silver slime?
The Secret World of Alex Mack? Both shows are executive produced/"created by" Tom Lynch of the Tom Lynch Company, who is apparently known for making successful tween television. I don't know how much was him, creatively, but these shows - along with
The Journey of Allen Strange where an alien child abandoned on earth takes the form of a young black boy and befriends two other kids - all had rote yet weird premises that were very much "of their time".
edit 3: A. The overall opinion on Galidor is less negative than I thought - the majority of people dissing on it consider it to be a design betrayal on Lego's part. Otherwise the quality of the figures were often appreciated. There are enough fans of Galidor to leave YouTube comments sticking up for it:
ITS MY LIFE NOT CRAP U PIECCE OF SHIET
B. There was a game on the PS2 that got ported to PC. It's not good
C. "Bluetooth" is not a tech reference; it and "Gorm" the villain are both references to Danish royalty.