Hikakin Collaboration Event

A collaboration event between Nyanko Daisensou and a popular Japanese YouTuber Hikakin (ヒカキン HIKAKIN) was held from September 27th, 2014 to ??Needs confirmation and reasearch. and from November 8th, 2018 to November 15th, 2018. The collaboration included exclusive Serial Codes that are no longer able to be used due to being removed.

Hikakin Advent

 * ヒカキン降臨

Hikakin Awakens!

 * 開眼のヒカキン襲来！

2014 Collab
Using the exclusive collaboration Serial Code "ヒカ－キン" would unlock the unit known as Hikakin. After reaching level 10, he can further evolve into his True Form by using the code ( ひかきん － しんか ).
 * 【Special】 Hikakin - ?