Board Thread:General Discussion/@comment-28846808-20160627160304/@comment-27095444-20160627221206

An event created between two games is usually called a collaboration event. Sure, this one is rather strange and its very different from the others. But that's because these both games are created by the same creator - PONOS.

Also, The Battle Cats POP! has a clear purpose - promoting their brand new game. Stage name "At Nintendo eShop!" is a clear example. That name just yells at you "Go buy our new game!!!"

This is more of a celebration event than anything. But "Collaboration event" makes more sense for me...