Board Thread:General Discussion/@comment-24366751-20170404040517/@comment-24922135-20170416133304

Like I said, they needed more variation in the alien designs. They couldn't keep Stinkfly's old design cos the toys were bad (and honestly, they were). So they took Overflow and made him bulkier. They probably did that because the original 10 aliens are way more iconic than the UA aliens so no one would casually notice the change to Water Hazard.