robot 64 lore (based on game events and trailers):
BRIBBLECO. needs a cleaner for their buliding... they are hiring a cleaner.
somehow, this is during the time that smar is making a turnip clean itself (in knoddys resort). once beebo finishes destroying the sun. smar sells the turnip cleaning project to BRIBBLECO. and thats how todd the turnip is born.
and now. since the sun is destroyed, the citizens of beebos world move underground, starting the super cube cavern lore

tl;dr, smar make turnip, sell to bribbleco, scc storyline happens