[AC0 Blue] - Collaborative Afterthought with Kamen Rider Build

An unannounced addition actually came with the latest June 27 update to Taiko no Tatsujin Blue ver.: Play the Kamen Rider Build theme song Be The One with a Banapassport (or equivalent) and get the Kamen Rider Build (仮面ライダービルド) outfit with the title "The Rules of Victory is Set!" (勝利の法則は決まった！, a quote from the anime).
Source (4Gamer)
...that's it for this post. We do have more to talk about the Performance Battle Mode but only a fuller separate coverage would do it justice.