Sonic Slash (ソニックスラッシュ, Sonikku Surasshu?) is a technique that appears in Kingdom Hearts III. While in Flowmotion, it allows the user to close in on enemies and perform two consecutive slashes.
In Kingdom Hearts III, Sonic Slash is an action ability that costs 2 AP to equip. It can be used while the user is in Flowmotion and not directly above an enemy.