A few more Metal Gilgans which appear in the episode leading up to Nue's debut in TBATME.
Explanations
GBX-RO27 Fanton: A mass produced unmanned Metal Gilgan which pretty much sucks at everything aside from cannon-fodding duties. Powers include flight, and weak machine guns on each arm, sides of "head", and front of the waistplate. They have incredibly weak armour and can be destroyed by pretty much anything in 1 hit, and can pretty much be considered the weakest mech in the whole of TBATME to the point of being even weaker than Gun Volts. Quite embarrassingly, it's name comes from the word "饭桶" (literally translating to rice bucket)...........a Chinese derogatory word meaning loser or useless person, which alludes to this Metal Gilgan's uselessness. They are so useless to the point that they're only used for testing new Metal Gilgans. The only time they were ever used in proper combat against the main protagonists was when they were being used as lures to get Sanae and Froggyrizer out in the open for the Wanyūdō to finish them off.
DVRS-T3636 Wanyūdō: Arguably the most powerful mech Murasa has piloted throughout the entire series. It was developed using the data collected from Froggyrizer X in the past battles and also the special Decker Alloy and Destron Gear which the Mecha Empire stole in the previous 2 episodes. It resembles an replica of Froggyrizer although it has a black and gold colour scheme (as opposed to Froggyrizer's green colour scheme), details resembling the Yokai this mecha was named after and partially based on (as opposed to Froggyrizer's frog details), and a more menacing head design. Powers include a truck form (as opposed to Froggyrizer's frog toy form), the Kotoshime, which is a sword imitating Froggyrizer's Sound-Frequency Sword, shoulder guns based on Froggyrizer's shoulder guns, missiles which cause massive damage and have a special interference signal which prevents Froggyrizer from combining into Froggyrizer X, and a forehead laser cutter. It can also hijack Froggyrizer's support vehicles and combine with them.
DVRS-T3636-B Black Froggyrizer X: The result when Wanyūdō hijacks
Froggyrizer's support vehicles and combines with them. It has access to all of Froggyrizer's weaponry and also gains a more menacing head design and back wings, allowing it to fly without the need of combining with Reimu's Zephyr Aleste. It also has several guns located on the wheel-like face on its torso, a head laser cannon, and a more evil-looking sword as opposed to Froggyrizer X's Ichimonji-Ken, which can fire a deadly red laser beam from the tip.
GBX-R028 Desphias: A Mercenary-themed Metal Gilgan developed by Nue and provided to Murasa to use. Powers include flight, a special rifle named the Desu Slugthrower which doubles as a sword, a torso flamethrower, crotch machine guns. missile pods in the shoulders and back fin-like constructs, transforming its hands into sickle-like weapons, built-in arm launchers which fire spinning blades, a laser cannon hidden in the head, and robotic wasp-like droids released from the torso armed with drill missiles on the tail. After Murasa defects from the empire, this mech was used by her until it was destroyed by Desu Gabyoal's robot form.