The second Byarlant Custom unit was created at Torrington Base as a hybrid "creature" (Chimera) of Titans mobile suits. The Byarlant Custom 02 is the finished version of the Byarlant Custom, as opposed to Unit 1, which is a modification validation unit. Unit 2 replaced the back-mounted propellant tank/thruster units of Unit 1 with movable binders featuring integrated beam guns, thrusters, and fuel tanks. Other alterations between Unit 1 and Unit 2 were the use of standard MS hands to carry portable weapons, minor changes to the foot design, and new armament.

Because they can generate beam sabers, the two long beam rifles on the Byarlant Custom 02's arms can be used as ranged or melee combat weapons. The shields atop the long beam guns are Aero Armor, which can be employed to lessen air resistance when held in front of the mobile suit during high-speed flight. The Byarlant Custom 02 can join the ORX-005 Gaplant's booster to its rear skirt thruster, increasing thrust and allowing the mobile suit to reach higher strata of the atmosphere on its own.

The kit shares the same molds with the HGUC 1/144 BYARLANT CUSTOM 02 provided with different color scheme.

It also comes with special connection components that can be linked to the booster of the HGUC 1/144 Gaplant (sold separately), recreating the flight configuration shown in the manga.