The Me-02R Messer is a mass-produced mobile suit developed from the AMS-119 Geara Doga. It was featured in the Mobile Suit Gundam: Hathaway's Flash.

The mainstay mobile suit of the anti-Earth Federation terrorist organization "Mafty" in U.C. 0105, the Messer was produced by Anaheim Electronics under Mafty's commission. Created as a part of the same line as former Neo Zeon mobile suits like the AMS-119 Geara Doga and the MSN-04 Sazabi, the Messer has various Zeon-type mobile suit design elements, such as the mono-eye sensor in the head, rounded armor parts and spiked shoulder armor. This is likely done to hide Anaheim Electronics' involvement with an anti-Federation organization. However, features such as air intakes on the chest, which were usually only seen on Federation MS, were also incorporated.

Despite its large size and heavy armor, the Messer has high maneuverability and mobility due to powerful main thrusters on its back as well as various sub-thrusters on its legs and waist. It also has vectored tail stabilizer on its back that can be used for air braking and attitude control when free falling from high altitudes. The Messer was intended for guerilla warfare and adopted armaments including vulcan guns, beam sabers, a beam rifle and a shield so as to be highly versatile. It can also use various weapons derived from Federation MS. Most of the time, the Messer will enter combat using the Galcezon sub-flight system.