Level X

Level X (レベルX), which can be doubled to Level XX (レベルXX) in the case of Mighty Brothers XX, is the enhanced fighter form of the Ex-Aid Riders, which is accessed through the use of a Level X Rider Gashat. Level X forms are far superior to the previous forms of the original 10 Gashats. It is also the first Level since Level 1 that can be taken directly from civilian form, though Level 2 is later seen to be attainable by opening the Driver cover early to skip Level 1.

In reality, as revealed by Kuroto, Level X's actual power is designated "unknown", meaning the power state of these forms can be implied to be either more powerful than any other Levels or still the lowest. Dangerous Zombie's Level X power can be increased by its user taking hits to "die" and revive, eventually causing a massive burst of energy upon one of Kuroto's transformations.

Level X can be accessed by Ex-Aid by inserting the Mighty Brothers XX Gashat into the Gamer Driver while the cover is closed (taking up both slots at once), and then opening the cover once. Ex-Aid's Level X form can also trigger finishing moves in this same manner, though how the equipment distinguishes the two commands is unclear. In the case of Genm, he inserts the Dangerous Zombie Gashat into the Buggle Driver and then presses the small red button next to the Gashat slot. Poppy does the same, using the Tokimeki Crisis Gashat and Buggle Driver II.

Kamen Riders

 * Kamen Rider Ex-Aid
 * Mighty Brothers XX (Heisei Generations: Dr. Pac-Man vs. Ex-Aid & Ghost with Legend Rider, Ex-Aid Episodes 13-16, 18, 20-24 <--30-->, Chou Super Hero Taisen)
 * Kamen Rider Genm
 * Dangerous Zombie (Ex-Aid Episodes 12-23, Chou Super Hero Taisen, Snipe: Episode ZERO)
 * Kamen Rider Poppy
 * Toki Meki Crisis (Ex-Aid Episode 26)

Bugsters

 * Motors Bugster (Ex-Aid Episode 24)
 * Salty Bugster (Ex-Aid Episode 25)