Jaune gets his transcripts revealed by Weiss, and majority of the student body beat him up regularly for it. Hated and shunned by the students, and unable to get help even by Ozpin, Professor Port and Doctor Oobleck - Jaune was forced to undergo daily bullying.
Weiss and Yang hated his guts, Blake was hypocritical about him faking his way in and Ruby felt like he was another Torchwick. Meanwhile his own team stood by his side, despite the transcripts, and Team CVFY had respect for Jaune since he stood by Velvet when she got bullied for her Faunus traits.
While all this was happening, Cardin took a moment to evaluate himself as a person and as a Huntsman from the events of the Forever Fall. He decided to make changes with his team to be better than being a bunch of bullies, seeing as they felt like they owed Jaune a debt to repay.
Unfortunately they couldn't do anything when the beating got too much to the point Jaune fled to the Emerald Forest, and killed by an Ursa Major -though he killed it before the Grimm killed him.
But it wasn't the end for Jaune's journey, as he got sent to another world by Oum to become the hero known to the world called Earth as Rex Salazar, with his memories being locked away until he is needed in Remnant.
When all is said and done, Rex kept the Meta Nanites by having only him control it and no one else, with the failsafe of them turning off should he get brainwashed - somehow.
With the world mostly cured of EVOs, he along with Six, Holiday and The Pack got sent over to Remnant to aid against the Grimm. From there, Rex got his memories back from being Jaune Arc and told the others of what happened. Needless to say they were unimpressed with Beacon.
Jaune saves Cardin from the Urse Major. But later he revels his false Transcripts. And become bullied, shunned, being disowned. But all that changes when he goes to another world. And stops aging. To learn the secrets of planet earth and the techniques and technologies from his masters and friends. Saving the world from countless evil doers. At the end of the last one at the hands of Majin Buu. Goku, Vegeta, Jaune beat the Majin but surprisingly He knows he must save his world in his dimension saying goodbye jaune comes back after a month of his disappearance. Finding it better he starts on the works of saving his planet.