
If you're looking for manga similar to Zoids: New Century, you might like these titles.
Ten years ago, Tatsuya Yuuki befriended a boy who taught him all about Gunpla and battling. This is the story about the GBF world back then, showing Tatsuya’s story and progression as an amazing builder and fighter!
Perverted, cocky Ken used to live a normal life until several giant monsters crashed onto his city. In the midst of their carnage Ken’s secret crush was killed, and his grandfather seriously injured. Hope seemed lost for the inhabitants of the city and the world, until Ken discovered that he holds the key to summon the pilotable Beast-God Riger! Within the massive bio armor, Ken must now battle the invading monsters to protect Earth, and keep them from awakening a demon within the Demon Stone – a demon who will put a stop to all human life for good!
Universal Century 0153. 17 years have passed since the "Steel Seven" defeated the remnants of the Jupiter Empire. As a new conflict brews between a Side 2 faction known as the Zanscare Empire and the League Militaire/Earth Federation a high schooler on Side 3, Font Baud, is hunted by Zanscare special forces when he discovers their secret Newtype weapon. However, he encounters a little girl, who is accompanied by a blind man and is rescued by the strange return of a mobile suit that defeated the Jovians.
The year is Cosmic Era 70. The world is a dangerous place, and the universe has been taken over by thieves and pirates. Lowe Gear, a brilliant junk-tech mechanic, discovers a top-secret Mobile Suit in the midst of space debris. This mysterious Mobile Suit seems to have been at the top of everyone's holiday shopping list-and now everyone is after Lowe!
In A.G. 101 (the 101st year of the Advanced Generation calendar) a mysterious entity known only as "UE", or "unknown enemy", attacks and destroys the space colony Angel. This brutal attack becomes infamous as the "The Day the Angel Fell", and marks the beginning of humanity's war for survival. When in A.G. 108 the UE attack the space colony Ovan, where Flit Asuno now lives after he escaped colony Angel before its destruction. Flit's mother shortly before she is killed by the UE, she gives her son an object called "AGE Device". Within it he discovers the blueprints for a powerful weapon from the past—the ancient messiah named "Gundam."