Here's my idea for a stage based on ROB. Picture the Battlefield. Now make the main platform a thick, straight line, and get rid of the uppermost platform. Take the right platform and put it below the main one. Put switches on both minor platforms. The idea is that a giant ROB is looming in the background. There are also two piles of stack-up blocks, the tops of which act as platforms (you can walk past the piles). ROB can and will move the block piles and whoever is on them during the course of the fight. Also, he may put a top on the field (only 1 top would be on the field at a time). If he places it on a switch, then it stays there for a minute. During the time it is on the switch, the field is changed physically. For example, a section of the main platform may fall and stay gone until the top falls off the switch. If the top is placed anywhere else, it will move around and bounce off of characters and stacks of blocks until it falls off the stage.