I have been recently going through the Fandom for the Marblelympics and have seen a couple mentions of something called the Fruit Circuit. It has only a few mentions across the entire web and no Fandom page. All I have learned is that the Raspberry Racers, Limers, O'rangers, and Mellow Yellow come from it, it was discontinued in 2016, and has some association with Jelle's Marble Runs. I would like to know more about the Fruit Circuit, its teams that are not in the Marblelympics, events in it, why it has so few mentions across the web, and anything else about it you might know about it.
Well, the Fruit Circuit was never a real-life thing (as in, there were never any events run with actual marbles). It's more of a piece of lore for the origins of the four teams you listed. Here's an official blog post that has some details about it, along with other lore for the O'rangers : https://www.marble-sports.com/retrollspective-orangers/1295/
The main "legacy" of the Fruit Circuit is that the teams from it have some rivalries with each other. There's a possible "Citrus rivalry" between the O'rangers, Limers, and Mellow Yellow, and especially the rivalry between the Limers and Raspberry Racers (more details about the RR/Limers rivalry in this reddit post, along with other misc. lore) https://www.reddit.com/r/Marblelympics/comments/7melnb/approved_answers_from_the_last_community_qa/
This is the best info I have. I hope this helps.
What do you think?