Oh! I just now realize all those hip-hop artists above weren't just making 1 or 2 line references to this 90s cartoon character on their own volition, (which would be awesome allusions in their own right) but they were actually commissioned to collaborate on an album revolving him, the quirky boy genius.
I was originally looking the 15-30 second bumps this show used to have, but came across this instead, again. I also learned there were some music videos produced that featured this cartoon universe. I'll get on looking for those, too, I suppose.