This exploit takes advantage of the Thistle Jump Custom Equipment, Light Smash, and the fact that certain abilities give recovery options, and can be used repeatedly in the air. So far, the only characters that have been found to have suitable recoveries that can be used repeatedly are Ike, Sonic, and Pac-Man, and Kirby.
How to Perform the Exploit
For all 4 characters, one must equip certain recovery custom specials, as well as (Usually) 3 seperate Thistle Jump equipment, and enter a Light Smash. Quickly repeating their special move will result in them gaining height infinitely
Custom Moves needed
Ike - Tempest
Sonic - Hammer Spin Jump
Pac-Man - Any Down Special will work, though Dire Hydrant is the best
Kirby - Jumping Inhale and Hammer Bash