If they're dashdancing at shorter distances, you could try walk up jab->grab. If the distance is longer, run, cancel run with crouch, jab->grab. If the distance is more variable, again, walk forward, max speed, follow them so you're always close, or able to close distance in initial dash. Beware of crouch cancelling.By walking forward, you're approaching the entire time, it's aggressive as you can get! Running or walking forward into shield is still aggro in my book because you're taking ground. Oh yeah, cp people to small stages and abuse invincible ledgedash, it's broken. Don't nair people who CC a lot until extremely high percents. If the opponent tries to wall you out with ftilts, some variation of hold forward, shield, retaliate will work when they can hit, and if they miss, they give you a free smash attack, shine, or grab.