Do we ever get an explanation for how Marty and doc Brown became friends?

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Do we ever get an explanation for how Marty and doc Brown became friends?
Mr & Mrs X #6 (2018)
when did firestar learn to astral project
Hold up... how did Curtis get ahold of the skull Waverly married?
And he obviously knew the significance because he was all “Keeper of the Bones” in his note. It’s not something he just stumbled upon and was like “cool skull! Gonna leave it to my niece hidden in a piano.”
Michelle married Ward, and Gus is Michelle’s sister, and Gus married Curtis, so Curtis isn’t an Earp. I know he was a local history nut, but still weird that he would’ve kept the skull because of an urban legend. He must’ve known something.
Hey what the fuck was Gl'bgolyb up to before Feferi hatched? Did she feed herself back then? Why can't she feed herself while Feferi's around? Was Condy regularly coming back to Alternia to feed her? Every fucking day? Did she have it delegated to another group? If someone was coming back to feed her, wouldn't they have killed Feferi? Did Gl'bgolyb go into fucking hibernation or something? And you can say "another fuschia" all you like, there is NOT a steady stream of those fuckers, there are gaps and no explanation for why the Vast Glub wasn't happening during them
and where does all that hair go once they exit super saiyan mode?
does it fall out? does it all just....retract into their scalp? does it dematerialize?
also, Becker looks like he is fucking pissed at Matt - what the hell happened between the two of them?
Ok here's a tiny little problem I have with Doctor Who and the TARDIS translating everything.
Lets take the episode with Pompeii, for example.
Now to Donna, they sound like they are speaking English. And to the Italians she is speaking Italian.
But why does it make it look like the people of Pompeii's mouths move to form English words?