Cybuster

Cybuster (魔装機神サイバスター, Masō Kishin Saibasutā, lit. "Demon Machine God Armor Cybuster") is a 26-episode anime that aired in Japan between May 3, 1999 and October 25, 1999.

Plot
In an environmentally wrecked future Tokyo, a young man named Ken Ando joins an organization called DC. Little does he realize that his fate and that of Earth will be linked to a mysterious mecha from another world.