^ What the above poster said. I've tried both substitute and swords dance as the filler, and I think I prefer swords dance. Substitute is good to block status moves (burns mainly), but in 3's you'll usually have other pokemon in place that can prevent those burns. Not to mention that after 1 swords dance you pretty much kill everything and anything. It's up to you though, it depends on what you're running on your team :) --- d(^o^)b ~ And then I ate the bowl!