Here's my another, the third, OC Omega Koopa!
He's a forgotten older brother of King Bowser.
But what's he best is to bring the destruction of the Mushroom Kingdom (only that events on Super Mario Bros Heroes of the Stars Movie 2).
He's 65 years old, but he's stronger than Onaga Koopa, Mario, Asylus and Bowser and also faster than Yoshi and Boshi.
After the destruction of Mushroom Kingdom, he will reclaim the kingdom as Omega Kingdom, only Asylus will stop him.
The past about Omega Koopa is defeated by Asylus' father when he was 31 years old.
And so after some of years his heart turns into a pure evil monster and lead his own Omega army to rule this universe than Shroobs.
Hope you like it!
Omega Koopa (c) Yours Truly