Remix the project, use the marko template and make your oc but as a marko, and put it in and share and last person who remixes and adds their oc in posts a comment with the link. Try your best and this will be used in all the versions for the team credits page, other then a few decorations.
I'll add decorations in each seasonbox version and download the final credits page and name it "Team Credits - Seasonbox."