In ball clubs, Division 1 is the best division, you start out Crunchball in Division 4. Just feel lucky this isn't the confusing world of College Sports, where AAAA is the best /rant
In case this is killing anyone else, if you have completed the game you have to complete the specified level in the Challenge/achievement in order to unlock the challenge/achievement.
I wouldn't exactly call Normal Mode "harder" than Easy mode. Nice break from Cargo Bridge, except for how annoying those little animals got waving at me all the time.
@ExaIstari, Quadancentruo is using a similar strategy to the one where I beat that cave. Phoenix strike is kind of useless, but it does certainly clear out all the garbage between your spawn point and the castle which is real important since invincibility and trip. strength only work for a few seconds. You don't necessarily need to kill the goblin, just bring down the castle.