Based on the Liger Zero, the Energy Liger was first released in 2003, and the Zoid plays a significant role in the late Battle Story, one in particular playing a role in the conclusion of the New Battle Story as the personal Zoid of Neo-Zenebas Emperor Wolff Muroa. The Energy Liger also appears in the Zoids: Fuzors anime, and is believed by the characters to be the Legendary Alpha Zoid, the pursuit of which forms a subplot for most of the series. It also remains the only Liger Zoid that served as a "villain" zoid in the anime.
The Energy Liger is unusual, in that it uses a special power source for its weapons and other systems. The Zoid has a unique “Energy Charger” system built into its back. The Energy Charger feeds off the Energy Liger’s core power system and amplifies its output, producing tachyon particles that in turn power its weapons and movement systems. This gives the Energy Liger far greater speed and firepower than comparably sized Zoids.
The Energy Liger’s primary weapons, a twin-barrelled beam cannon and an eight-barrelled Gatling gun, are both powered by the Energy Charger. As a result, the weapons are very powerful and deal tremendous damage. The Energy Liger has a pair of wings, also powered by the Energy Charger, that provide the Zoid with limited flight capability, along with the ability to cut through opponents.
A year later in ZAC 2109, the Helic Republic attempted to retake their capital from the Zenebas forces. The Neo-Zenebas Emperor, Wolff Muroa, lead the counter attack from his own Energy Liger, which had been modified to have a higher engine output than a normal example of the Zoid. Again, the Energy Ligers proved to be superior to the Republic's Liger Zeroes; decimating the Helic Forces and preventing the Gairyuki units from destroying the Seismosaurus. Only the arrival of the Jet Falcon (ironically originally designed as a Fuzor partner for the Energy Liger) allowed the Republic to salvage their assault.
While the counter was largely successful, during the battle, the Energy Charger on Muroa's modified Zoid was damaged, threatening to explode in a detonation that would have wiped out the Republican capital and both armies. Republican hero Ray Gregg, piloting a Liger Zero Falcon, was able to link up with the Energy Liger and siphon off the excess energy.
The Energy Liger appeared several more times, saving RD on several occasions, while launching seemingly random attacks at other times. Each time, the Zoid ran off, disappearing just as abruptly as it appeared. The opening animation from the English language version of Fuzors from episode 20 onwards depicts a sequence of the Energy Liger running alongside the Liger Zero Falcon, its energy charger connecting to the Falcon’s body. This scene never occurred in either version of Fuzors, but this may be a tribute to the events of the Battle Story.
The Energy Liger kit comes on six frames, along with a battery-powered motor and air pump, an air unit, two sets of bellows, two different weapons pods, four different tubes, sixteen rubber caps, a stand, four small connection adaptors, a small blue pilot and label sheets. The Energy Liger is moulded in metallic red, maroon, black and dull silver.
The Energy Liger’s construction is reasonably involved, and is quite complicated by the standards of cat-like Zoids, differing significantly from the “standard” construction. The Zoid uses a pair of “AA” batteries to power its motion. Normally when the Zoid is motorised, it walks forwards at a reasonable pace. Additionally, the two bellows pump, supplying air to the Zoids other systems.
The Energy Liger’s air system can then be set to transmit the air from the pump to either the wings or the cannons. When connected to the wings, the wings will automatically open as the Zoid walks. When connected to the cannons, the gattling cannon spins while the 2-barrled cannon pulses back and forth.
While no specific upgrade kits were released for the Energy Liger, the Zoid could be combined with the Scissor Storm and Laser Storm Blox Zoids, as well as Styluarmor, and Raykong (Gorilla Tron) Blox Zoids.
The Energy Liger was released in Japan in December 2003, and remained in production during 2004. Unusually, the model was released in both the US and Japan at the same time, and it appears that the Zoid was jointly developed by TOMY and Hasbro. The Energy Liger is the seventy-second Zoid developed in the NJR line, and is thus given the designation number EZ-072.
While the NJR Energy Liger is a Neo-Zenebas Zoid, the NAR version is designated as a Guylos Zoid, and has Guylos insignia stickers included. The NAR Zoid was also re-designated "EZ-102".
Interestingly enough, the box of the Hasbro Energy Liger does not exactly depict the model. Instead the images are of a prototype, with a number of differences in mould to the finished model. This has led to speculation that the Energy Liger was partially (or wholly) designed by Hasbro.
The Energy Liger was also intended for release as a part of the New Pacific Release, but the line was cancelled before the Zoid was released.
Also, unlike most other side Fuzors commonly depicted on the sides of the Fuzors packaging, instructions for the Energy Liger / Jet Falcon Fuzor can be found within the instruction booklets of the Liger Zero Falcon, Jet Falcon, and the Energy Liger.