This is the lore for the version of Blur in the Funnymon AU series (IS NOT CANON TO THE FUNNYMON LORE UNLESS STATED SO BY @Funnymon260 HERSELF).
Creation: Blur is a rare occurrence of a multiversal anomaly: His universe didn't have a Sonic. At least, not at first. Scientists were trying to understand how animals like eels could store electricity in their bodies, and tried to copy that into another animal: a hedgehog. Now, while it DID work, it didn't have the expected results. Somehow, Mobian DNA had been present in the molecular fusing, creating a hedgehog Mobian that could store electricity in his body: more specifically, his quills. This, however, lead to his muscles being able to convert the stored electricity into strength and speed in his limbs. The more he ran, the more electricity he generated from friction. The more electricity he generated, the more energy he stored into his quills. The more energy he had stored in his quills, the faster he ran. This cycle is how Blur is different from every Sonic variant: he had the power of exponentially infinite speed. The more he ran, the faster he got, and the faster he got, the more he could run. Origin: Blur was considered a "partial failure" and was used as the basis for a better project: "Project Sonic". Now, this universe was already unstable from Blur's exponentially infinite speed, but when Sonic was created, the fabric of that reality was torn, creating ripples through the STHH Multiversal Cluster (The section of the Infinitiverse that has every universal variant of Sonic), affecting their stability as well. This caused an unseen force to forcibly erase the timeline from the beginning, stopping it from affecting any of the other universes permanently. Luckily, Blur was thrown into the 7th dimension of reality, floating between universes for 10 years before ending up in a white void. (The Ask AU dimension) There he met multiple variants of Sonic: befriending some, picking fights with others, but never truly having a home. He tried to live in some of the universes connected through Portal Ring travel, but most of the time, he was chased away by the inhabitants, being seen as a creation of Eggman's as a way to try and replace Sonic. Universe after universe, it was the same: Enter, try to help out, get chased out, repeat. After losing hope, he tried to live in the white void, but it's caretaker wasn't happy with the idea, and kept stopping him. Eventually fed up, he went to one of the Sonic AUs (Demon AU, Nickname "Demon") to help him find a home, eventually finding a cabin in the countryside of a more peaceful universe. He still occasionally visits the white void to hang out with the Main Sonic AU Gang (Swifty's idea for the group name) from time to time, and sometimes "Accidentally" ending up in some of their universes. (Monet/Creator throwing him out of the white void, the reason changing from time to time) Friends: Swifty, Robo, Mochi, Spirit (Scary Nights AU), Spike (Primultium Corruption AU), Clay, Sprout (Forest Guardian AU). Frenemies: Shadow, Monet, Shadow Sonic, Sonar. Enemies: (None known so far, Will update)