Popsydoodles
Smash Journeyman
The inbetween titles are why I'm not a fan. The "press A to win" mechanic got old in Kingdom Hearts II, which, while a great game, had huge flaws that were never fixed. I wished they go back more to the great battle system stuff they had in the first game.
The inbetween titles have great significance to the story and are just as important as 3.