Released by Bandai was the Gundam The End of Saga Adou from Team Celestial Sphere. The Gundam The End can be seen in the Gundam Build Fighters Anime series. This particular model kit was released as a 1/144 High Grade model kit.
The 1/144 High Grade Gundam The End is selling for $20.76 at Amazon.
Construction Manual & Color Guide for the 1/144 High Grade Gundam The End was translated to English from the Japanese Manual posted at Dalong's Gunpla & Model Kit Review site. For the meaning of the symbols found in the model kit's manual, kindly refer to this old post.
Paints Used & Paint Conversion Equivalents: