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In previous Super Smash Bros. games, great techniques were discovered that allowed one to gain thousands of meters in a single Home Run Contest match.  In Brawl, the Home Run Contest gameplay is different, which allows for even more techniques.  So far, all I do is throw the bat at the sandbag as fast as I can.  This will get me about 1500 meters, but I am aiming to get 2000 meters.  Does anyone else know a good technique to gain more distance?

That's quite brilliant really. I never would have thought to throw the bat at it. The co-op will make this so much better. I'm thinking it might get some serious damage if you took the two psychic kids, put the sandbag in the middle, and repeatedly burned it. You can also probably do heavy damage by having one player grab it or rapid hit it to pin it into a corner. Then the other could beat on it with heavy smash attacks without having to worry about it flying away.