Legit just some au I made a few weeks ago (combines the SMB 3 show and the games) and is heavily based on my own HC'S
Base idea of it
A young Kooky Von Koopa was making a Portal machine for fun in the basement, which they got all to themselves. When they go to test it for the first time, all goes well, until they decide to step through the portal... with the gateway home closing behind them they have no way of returning meeting new friends with alternate versions of them & their siblings trying to rebuild the portal along the way.
Who knows where their story will go!
All characters belong to Nintendo
Cover by me