Because the Dominus is quite a nice Supersonic Rocket-Powered Acrobatic...
Supersonic Acrofatic Rocket....
SonicSuper Acrobatic.....
...Quite a nice vehicle in Rocket League
Because Mr.Ass is Billy Gunn's more successful gimmick than his "The One and Only" gimmick.
"I love to love 'em, I love to kick 'em
I love to shove 'em, I love to stick 'em
Love to flaunt 'em, I love to watch 'em
I love to pick 'em, And I'm gonna kick 'em"
Found my birth image on NASA's APOD image archive and decided it was a little bit small (under 500 pixels) and grainy. So I went into Illustrator and re-made it.