It's trying hard to push through in the US and Europe but it was always going to do better in Japan. Still the series obviously has legs and sold enough to warrant further ports west. It is pretty charming, well made (some pacing niggles apparently) and offers something a little different. People suffering from Pokemon Sun/Moon fatigue might want to hold off (or maybe jump ship to Yo-kai watch altogether dep on how you felt about Sun/Moon!)
Currently best pre order price around but i'm aware its nearly rrp. So more of a heads up. Release is in June.
I've had a look and they genuinely seem pretty interesting games.
Crazy names.Bony SpiritsFleshy Souls
EDIT: If you are desperate to play these games right now they have already been released in Australia which is also pal region. You could import and they would of course play fine on UK/European 3ds consoles. Prices are generally about £33 per game.