Infinite Monado Arts glitch
The Infinite Monado Arts Glitch was a glitch in Super Smash Bros. Ultimate which allowed Shulk to retain every effect of Monado Arts at once. It involved Shulk being hit by King K. Rool's Blast-O-Matic, timed so that his currently-active Monado Art expires between the second (laser) and third (launching) hits. When done correctly, Shulk would have no visible effects of any Arts, but all five of them would be active at once, mixing any overlapping properties together. The glitch also incurred RCO lag where if any aerial move is used during the glitch, the landing lag would last much longer than normal. The glitch also worked for Kirby, if Kirby inhaled Shulk with the Monado Art. The only way to remove the glitch was to self-destruct or use a transformation item.
The glitch was fixed in version 2.0.0.