Peach you were constantly Up-smashing and F-airing to do damage. Her best damage aerial is D-air since it combos. Just float about the height of their head then lead into them with it. Usually combos nicely into an n-air or u-air. U-tilt should be used instead of Up-smash whenever someones above you. Up-smash should be able to KO Mario at 80% with a sweet spot hit at the shoulder pads.
D-air shown a lot in this video: http://youtube.com/watch?v=E9OfEl3cSb0
Learning to Glide Toss for turnips wouldn't hurt either.
Pikachu you used F-smash a lot, almost every time I got near you. I think you Up-smashed with him quite a bit too. D-smash is better for damage then the other two.
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http://community.modnation.com/en-us/players/IvoYaridovich/creations
