What is the best way to win at SSBU? I only do ok when shielding and then grabbing the opponent. I can't seem to get past level 3 computers when fighting like that. If I do it any other way I get KO'd.
Eh it's pretty basic advice. Instead try to anticipate when they're going to attack and what attack they'll use. Slower characters are more easily telegraphed but they tend to have other tricks up their sleeves such as their specials or surprisingly quick aerials that can lead into a slower, stronger attack combo. Also instead of shielding, you can do side-stepping or roll dodging. This also dodges their attempt at grabbing you. But if they anticipate you shielding or dodging, they CAN grab you or try to manuever themselves around your shield to try to hit you, especially if the shield is weak. Additionally, if you try to dodge, they can follow through with a quick attack and catch you OR downsmash can grab you if you try rolling behind them, like Wario's dsmash, Ganondorf/Captain Falcon's dsmash designed to punish rollers.if an opponent is going to hit you with an attack, shield it to leave them wide open to attack. however don't do that if the attack is too strong or your shield will break.
True, but you should also incorporate aerials as part of your ground game too, not just when the opponent's airborne. Again, short hops are crucial to learn. As a Mario main, I like to use short-hops plus neutral air since neutral air comes out so quick, but also d-air's another good anti-juggle move.you should learn how to use aerials better. they're incredibly useful if you wanna edgeguard, and they can also come out as fast attacks. plus some of them like mario's forward air or k rool's down air spike, so you should get better at using them offstage.