Anyone else notice the Sonic Spinball call backs in Studiopolis Zone? In all my playthroughs of CPZ (and I've played through it a bunch already) I have yet to see Robotnik do a chain at all. He will, at most, drop a single dud puyo. You could beat the dude without yourself doing a single chain. It's one of the easiest rounds of Puyo Puyo ever. I can't stess that enough -- it's significantly easier than actual puyo puyo. You can win simply by matching colors, you don't even need an actual strategy.