Friend or Foe?

Henry and Ralph meets someone from an Alternate universe, they warned them that their universe is in grave danger, so Ralph and Henry have to go with them to their universe. Will they save their universe? (No ocs) & also it has violence so a little content warning (on a short hiatus, until I get my motivation back I will try to post as much as possible) artwork is mine, but the art doesn't apply to the fic at all lol