Really you have to use some sort of gimmick (skillshot, deke, or captain power) to score goals. Most of the characters have some method of scoring a guaranteed goal if the other team lets them get into position. The key is to not let your enemy get into position.
The idea is to put together a well balanced team with a variety of scoring options. I use Waluigi, Toad, Dry Bones, and Hammer Bro. That gives me three scoring dekes, two strong skillshots, a strong captain ability, two outstanding defenders, a playmaker and a power shooter. I try not to overuse any of these assets.
Even with a good team I still get my ass kicked most of the time though. Most of the time a defender creams me before I get anywhere near scoring position or if I get captain power I botch my set up for a megastrike.







