|Gachapin Challenge: Valiancer|
|Air date||April 1, 2014|
Gachapin Challenge: Valiancer is an April Fool's Day special, made available on the Buddy Complex official website on April 1, 2014 for 24 hours. The short stars Gachapin and Mukku, two characters from Japanese children's television series Hirake! Ponkikki.
To coincide with the short's release, the main page on the official website was temporarily changed to feature the two, and they were also added to the characters introduction page.
This short is composed of live action footage of the two main characters filmed in front of a blue screen intercut with stock footage of the show, along with some additional footage animated specifically for the short, and dubbed with new dialogue.
This short was included as a special feature in the 6th volume of the Blu-ray box, along with bloopers.
- This short is referenced in Buddy Complex: Coupling in Battlefield, where Dorzhiev was said to be mumbling about "red and green monsters" in shock after his defeat.