In Busy Box, the Vreedle Brothers return to claim a powerful device known only as the Naljian Destructor (it appears to have similar powers to Ship, since it, too, can create a robotic version of what ever it sees however, unlike Ship, it can copy anything upon sight instead of only being able to turn into already mechanical objects upon contact) and try to sell it to the highest bidder. Ben and Kevin managed to fend them off which sent them running.
After Ben won the tribunal upon appealing to Judge Domstol, Baz-l tried to stop the Vreedle brothers only to be shot by Rhomboid after he learned he was no longer going to pay them (though he regenerated a few minutes afterwards). As Julie didn't trust them and wanted to keep Ship anyway, they started turning violent, causing Ben to attack them. They first appeared in Don't Fear the Repo, where they were hired by Baz-l to return Ship to him. Octagon was first mentioned by Argit in Kevin's Big Score.
4.2 Ben 10 Ultimate Alien: Cosmic Destruction.
