Dr. Mario (SSB4)/Down smash
Dr. Mario's down smash is a breakdancing sweep with low startup lag. It has good range, decent power, and is a semi-spike, making it a good finisher, and also great at gimping recoveries. It also transitions well to the second hit, so it is great at punishing rolls. It is not as reliable a finisher as his other smashes, back throw, clean up special, or sweetspotted forward aerial however due to its low vertical range and merely average power. Its hitbox also isn't good enough for 2-framing, so it is best to use other options instead. The second hit does more damage and knockback than the first as well.