InaDan Gag Gaiden
Japanese title: イナダンギャグ外伝
Alternative titles: Inazuma GO Gag Gaiden, Danball Senki W Gag Gaiden
Type: ONA
Source: Game
Episodes: 19
Status: Finished Airing
Aired: Dec 7, 2012 to Dec 27, 2012
Duration: 30 sec per ep
Rating: G - All Ages
Genres: Comedy
Themes: Parody

This is a short gag that has nothing to do with the main story.
Created by a manga artist Manya Immortal Nosuke to commemorate the release of the movie Inazuma Eleven Go vs. Danball Senki W.

(Source: Official YouTube channel, edited)