InaDan Gag Gaiden  

Inazuma GO Gag Gaiden, Danball Senki W Gag Gaiden, イナダンギャグ外伝

The phrase "This is a short gag unrelated to the primary plot" was created by manga artist Manya Immortal Nosuke in honor of the film's launch, Inazuma Eleven Go vs. Danball Senki W.