Miracle Hero: Galaxy Guardian Force (A Doraemon AU) Volume 1

This tells the story of five friends, or should we say, the legendary Galaxy Heroes:

Galactic Fire, the Red Star of Courage
Galactic Thunder, the Yellow Star of Purity
Galactic Magic, the Pink Star of Love
Galactic Wind, the Green Star of Intelligence
Galactic Water, the Blue Star of Spirit

Their mission? To find the Keys of Balance and save the world from King Nixel And His Nixel Army.