Don't go on easy, that's for pussies.
The only hard part about the game is that you can't control your party members (but you can set their strategies on battle, so it's not so bad). Make sure you abuse the weakness system and form lots of social links. That's all, it's not a very hard game aside from a couple of boss battles.
"I've Underestimated the Horse Power from Mario Kart 8, I'll Never Doubt the WiiU's Engine Again"







