Never officially in the original दिखाना या PPGZ. In PPGD Blossom is currently w/ डेक्स्टर (shown below) and the RRB had only a few pages about them when Butch fought XJ-9. But it does दिखाना Boomer दिन dreaming about Bubbles a lil bit. So as of right now, they've only coupled up in प्रशंसक fiction and प्रशंसक art. (the picture below is from PPGD done द्वारा Bleedman. Just to make it clear, I'm not trying to steal anyone's artwork)
I fucking hate this couple and Bleedman! Bleedman can suck a sack of dicks, shove them up his नितंब, गधा one द्वारा one, and get raped द्वारा a horse for all I care!