Zero, the Flying Knight
After two defeats, the Dark Axis commander assigns another officer to Zapper Zaku's platoon, Grappler Gouf. Even with Shute's help, Captain is nearly overpowered by the two villains. That is when a new gundam appears to even the odds!
Aired 21/01/2004EP 3 - Zero, the Flying Knight
2004
SD Gundam Force
The land of Neotopia is attacked by the Dark Axis, evil invaders from another dimension who wish to conquer this land. Neotopia's answer: the secret Super Dimensional Guard and their defenders, the Gundam Force. Led by Captain Gundam, the Gundam Force and its team of Gundams with special abilities are aided by a boy named Shute as they stop at nothing to defend the land from the Dark Axis and to defeat them once and for all.
(Source: Anime News Network)