Mighty Brothers XX

Mighty Brothers XX (マイティブラザーズXX) is a co-op 3D action-platformer video game. Unlike the other Gashats made by Genm Corp, this game and its conceptualization and ideas were created by Emu Hojo. It also served as the basis for the Mighty Brothers XX Gashat.

It is seemingly a part of the same series of games as Mighty Action X, although Kuroto Dan does not acknowledge it, labeling it as a "bootleg."

Game Description
to be added

History
Emu, when he was a child, was the original creator of the game concept for Mighty Brothers XX. He created a drawing of an orange and green hero, designed gameplay mechanics on notes and would send it to Kuroto Dan in a fan letter. Unknown to Emu, Kuroto hated the fan letter as he realized that there were other people out there in the world that had his level of intelligence.

During Kamen Rider Heisei Generations: Dr. Pac-Man vs. Ex-Aid & Ghost with Legend Rider, Genomes forces Kuroto Dan's Proto Mighty Action X Gashat into Emu's Gamer Driver, causing Emu to momentarily explode in a light. However, Emu returns with Dan's Gashat as well as Emu's Mighty Action X Gashat combining to form the Mighty Brothers XX Gashat. Emu transforms using the new Gashat and defeats Genomes. But upon detransforming, the Gashat splits back into their respective Gashats, and Emu loses his memories of transforming using the Gashat in the first place.

Later, Emu is approached by Parad after the death of Kujo Kiriya, who tells him to show him that he can change fate. Emu would insert a dual-slot blank Gashat given to him by Parad, infecting him with lethal amounts of the Bugster Virus. But to everyone's surprise, including Kuroto's, Emu spawns a permanent version of the Mighty Brothers XX Gashat and transforms. He would later transform into his Level 20 form, splitting into two bodies.

After transforming, the 2 Ex-Aids begin arguing over who is who: the Orange one claiming to be M, while the Blue claims to be Emu. This infighting results in the Bugster and Genm escaping. After powering down and re-merging into a single being, Emu is stricken by a piercing headache and faints.

While Hiiro performs a complex operation to remove the cancer from their patient, Emu distracts the Aranbura Bugster, only to be attacked by Gemn, who intends to destroy the 'bootleg' game. Emu has finally realized the power of the Mighty Brothers; his two personalities have split. The Orange side, known as Level XX R is the hot-tempered gamer in him, while the Blue, Level XX L, is the cool, patient concerned doctor. In order to use this Gashat, both sides accept who they are and use Super-CoOp-Gameplay to defeat the Bugster.

Facing the Level 5 Revol Bugster that had emerged from Nico Saiba, Ex-Aid found that the hits he inflicted in the Double Action Gamer Level X strangely had no effect on his Bugster opponent, with Asuna Karino later reasoning that being the source of Nico's stress, and therefore an ally of the Bugster, was the cause. Ex-Aid was then confronted by Dan, who vowed to eliminate Emu's "bootleg" game. Splitting up into the Level XX R and L, Ex-Aid proved a match for Genm Zombie Gamer, forcing him to retreat with the Bugster. Though failing to terminate Emu's "bootleg", Dan was able to determine through the resulting fight data that Mighty Brothers XX did indeed equal the power of Level X, with the twin Double Action Gamers adding that up to "Level XX".

When Kuroto Dan reveals to Emu that he has the Bugster Virus, said virus broke out and Emu's personality changed entirely into that of M. During the time the virus had broken out, Emu did not use Mighty Brothers XX. It is unknown if this is coincidence, or if he was unable to. After recovering from the virus, Emu was reluctant to use Mighty Brothers XX, fearing his virus would break out again, but some brutal words from Taiga motivated him to do so. Emu assumed Ex-Aid Double Action Gamer Level XX against Genm Zombie Gamer Level X and the Vernier Bugster. After the Bugster was defeated by Snipe Simulation Gamer Level 50, the Double Action Gamers beat back Genm with a Critical Finish utilizing two Gashacon Key Slashers.

After having used it to care for Kuroto Dan and defeat his Bugster, Kuroto revealed that this had been his plot to retrieve data from the Charlie Bugster for Kamen Rider Chronicle. Emu used Double Action Gamer Level XX to combat Genm Zombie Gamer Level X, but was defeated easily and his Gamer Driver was destroyed.

Hiiro pointed to Mighty Brothers XX to prove that Emu had the power to complete Maximum Mighty X, inspiring Emu to do so.

Double Action Gamer

 * Kamen Rider Ex-Aid
 * Level X (Heisei Generations: Dr. Pac-Man vs. Ex-Aid & Ghost with Legend Rider, Ex-Aid Episode 13-16, 18, 20-22, Chou Super Hero Taisen)
 * Level XX (Heisei Generations: Dr. Pac-Man vs. Ex-Aid & Ghost with Legend Rider, Ex-Aid Episode 13-16, 18, 20-22, Chou Super Hero Taisen)

Bugsters
The Futago Bugster are the Bugsters manifested from Mighty Brothers XX.

Mighty Brothers XX Gashat
When activated, the Gashat reformats the battlefield into a Game Area.

Its original blank form was meant to be Parad's personal Gashat, made by Kuroto using the collected Bugster Viruses. Kuroto needed Parad to collect data by inserting the Gashat into a Bugster in order to complete it, but out of curiosity, Parad decided to give Emu the Gashat instead.

When used in a Gamer Driver, the incompleted Gashat injected Emu with massive amounts of the Bugster Virus. The Gashat could have killed Emu very easily, if not for his natural immunity to the virus. In a bright flash and the data from Emu's body merging with the blank Gashat, it changed into the Mighty Brothers XX Gashat as a result.