this is unoriginal! im sorry they yap so much in this pt 2 will be better and will include ford, bill, weirdmaggedon and etc. mabel and dippers parents have never appeared in canon so this is just my interpretation/au of them! sorry if a lot of vids r muted youtube hates me :(
au explained further:
their mom is the one cleaning up after dipper and mabel but loves to party and refuses to take blame for her actions.
their dad is a workaholic and cares a lot about dipper and mabel living up to his expectations.
(both of them still love dipper and mabel, but have trouble showing it due to their constant arguments with eachother)