Louies were in Party Edition, but only on "Medium" mode, which had the World Bombers from SB3 in it. If you chose "Hard" mode, you'd get to play as the Heavenly Kings and Great Bomber (as well as Honey and Kotetsu), but you wouldn't have Louies; Hard mode introduced a bunch of new animal things, some of which had new abilities like blocking bomb blasts or eating bombs.