|This Super Smash Bros. related article or section is a stub. You can help Smashpedia by expanding it.|
Upon using Thwack, Hero will make a large circular area appear in front of him after a short delay. Any enemy inside this area when it activates will have a chance to get instantly KO'd. This chance increases the higher the target's damage, meaning it'll OHKO an enemy at 100% or higher. If the enemy isn't KO'd, they will take minor damage and knockback. This move will not appear if Whack does. This move increases its size when Hero is giant, making this already powerful move extremely good.