...here is the Z-Knights Toy line comic strip which I found whilst on holiday. They may have done another issue like this as it says its volume 2. It was the last new strip to appear in the New Eagle before it was cancelled
According to a Zoids wiki page (here) the backstory here is as follows...
Aware that the nobles of Kilna would dispose of him after conquering Earth, Alfred order scientists under his command to bringing the 'Marine Kaizer' back into operation to use it as his trump card against Kilna's nobles afterward. Alfred send the Marine Kaizer to wiping out the Blue Star's Norther Knights at Northerland as MArine Kaizer's field test. However, the attack from Marine Kaizer accidentally awaken another titan sealed at Northerland, the Z-Knight. A young Earth lieutenant Bell Lance, who manage to control Z-Knight without system modification as his mother was a denizen of planet Zi. Successfully defeat the Marine Kaizer, Blue Star finally capable of counter Kilna's invasion by using the two titans to unlock their data and combine it with the smaller machine call Metal Foot.
...and here's the strip itself
Z Knights appeared in the September, October, November, December 1993 and the (final) January 1994 issue.