The Yokai Watch event has been run at least three times now, with the latest adding more minions and weapons for samurai, red mage, dancer, and gunbreaker, along with another mount for collecting all 17 weapons. But I'm given to understand that Yoshi-P is a personal friend of the director of Yokai Watch, which is part of why it gets a bigger event than most crossovers, and why it keeps coming back.