Instant double jump
How to perform
There are two types of instant double jump:
Perfect instant double jump
Perfect instant double jump, or buffered instant double jump, is performed by jumping, releasing the jump button, then double-jumping, all within 4 frames of each other. An aerial attack can be used at any point during these four frames.
Delayed instant double jump
Delayed instant double jump, also known as active hop or auto-cancel hop, is performed by double-jumping immediately after another jump (typically a short hop). In this case, aerial attacks can be used after the double jump.