I am really sad to again say this, but I've found even less info about Jigglypuff's rest percents than on Melee! I have looked all over the internet and can't find a single thing. All I know is that In Super Smash Bros. Brawl, Jigglypuff's Rest deals less initial damage and knockback, only gives vertical knockback, and produces a flower in place of its fiery Melee effect - essentially nerfing the move. In Brawl, its initial damage is 15%, with the flower damage between 7-15%. Again, I am very sorry.