yep, they are canon.

I don't like Finn and marceline together for some reason, I also prefer marceline and pb as close friends rather than lovers... Just my opinion

Don't like them cuz marceline is a little bit too old for finn I think like he's 15 and she look like 18 and actually has about 1000 y/o 😂

And Pb is in similar age as marceline and it fits better for me at least

For me the couples must be: marcy and Bonnie and Finn and Phoebe (FP)

im agree whit marceline whit pb, but i think fin got more chance whit a tree