Is it possible to fuse monsters on your opponents side of the field?

1st of all, the ojama tokens cannot be fused to form Ojama King because they're name is not "Ojama Yellow", "Ojama Green" and "Ojama Black" but instead they're name is "Ojama Token" and the're are only 2 ways to fuse in opponents side of the field, 1st is fusing Chimeratech Fortress Dragon with its effect and the Card Super Polymerization and thats the only thing on how you fuse monsters with opponents side of the field.