A "what if" space combat variant of Gundam Ez8 introduced in the game SD Gundam G Generation Gather Beat. Aside from being space worthy, the only difference to Gundam Ez8 is its handheld cannon which has a caliber of 200mm instead of the standard 180mm. In the game's story, Shiro launched to fight the Apsaras III in space, but was easily defeated as his Ez8 was not meant for space combat. Doctor J, aiding the heroes, modified the Ez8 into the Ez8 Kai for space combat. In the sequel SD Gundam G Generation Gather Beat 2, Ez8 Kai undergoes further modification using technology from the Gryps War era. Although its appearance does not change, its internal mechanism has been updated, so its performance is comparable to MS of the time. It also has two modification plans: RX-79Ez-8/HAC Gundam Ez8 Heavy Armed Custom and RX-79Ez-8/HMC Gundam Ez8 High Mobility Custom.
Gundam Ez8 Kai
（RX-79[G]Ez-8）A "what if" space combat variant of Gundam Ez8 introduced in the game SD Gundam G Generation Gather Beat. Aside from being space worthy, the only difference to Gundam Ez8 is its handheld cannon which has a caliber of 200mm instead of the standard 180mm. In the game's story, Shiro launched to fight the Apsaras III in space, but was easily defeated as his Ez8 was not meant for space combat. Doctor J, aiding the heroes, modified the Ez8 into the Ez8 Kai for space combat. In the sequel SD Gundam G Generation Gather Beat 2, Ez8 Kai undergoes further modification using technology from the Gryps War era. Although its appearance does not change, its internal mechanism has been updated, so its performance is comparable to MS of the time. It also has two modification plans: RX-79Ez-8/HAC Gundam Ez8 Heavy Armed Custom and RX-79Ez-8/HMC Gundam Ez8 High Mobility Custom.