Sailor Soldier of Love and Justice

It's pretty easy if you just play like normal only using your screen, but you can also set your level down or play on hard difficulty (which you might not have yet, I forget when you get that option) to make the fights more challenging. Or just play the top screen when you're close to a combo to get fusion attacks. I don't want to say too much since it kind of gets into spoilers, but it's probably easiest to control both screens toward the beginning of the game, at least part of the time, but later on I ended up deciding it was too difficult... ^^;