It's weird that this all of a sudden started happening. This is a sort of new joycon and hasn't been opened. It came with my OLED Switch, but I'm using it on my hacked Switch. For some reason when I want to use it wirelessly it searches for a second and then stops. It only does a longer search...
@Xdqwerty, Osu! Tatakae! Ouendan! is the Japanese version of the game, different settings/characters/songs but otherwise identical mechanics. I played that before I knew about Elite Beat Agents lol. Both fantastic games https://en.wikipedia.org/wiki/Osu!_Tatakae!_Ouendan