A lightweight free-to-play battle game, offering only a 4-player battle mode. In addition to CPU-vs. and local multi-player, it includes the Bomber Coliseum, a new single-player mode wherein you fight up to 25, 50 or 100 foes! (not all at once, sadly)
This game also has the dubious honour of being the first in the series to include microtransactions. Custom skins and even battle stages are locked behind challenges or paywalls, forcing you to get good or pay 100 Yen to unlock them. Thanks, Konami.