Eyeshield 21: MAX Devil Power is the first Eyeshield 21 video game for the Nintendo DS. It's based around the anime series from Eyeshield 21. It has only been released in Japan.
The game centers around Deimon High School student Sena Kobayakawa, who is pressured into becoming the star running back of the school's American football team, the Deimon Devil Bats, under the secret identity of Eyeshield 21.
The story mode follows the manga and anime until the end of the first game between Deimon and the Ojo White Knights, then it branches off, with Sena also playing for other teams seen in the series, seemingly with the other teams' knowledge of just who Eyeshield 21 really is.
There are a total of 8 playable teams in this game:
- Deimon Devil Bats
- Oujou White Knights
- Taiyō Sphinx
- Nasa Aliens/Nasa Shuttles
- Seibu Wild Gunmen
- Zokugaku Chameleons
- Koigahama Cupids
- Kyoshin Poseidon - this team is unlockable by playing the game with a copy of Eyeshield 21: Devilbats Devildays in the DS' GBA slot.