Stronger Enemies
X, O, , , X, , O, O, X, O, O, X
Weaker Enemies
X, O, O, , X, , , O
Unlimited Arrows
X, O, , , X, , O, O, X, , , X
Enemy AI off in Arenas
X, O, O, O, X, , , , X, O, , X
Health pick-ups 100%
X, X, X, X, , , , , O, O, O ,O
Unlock Costume and Extra Art
To get Costumes and Extra Art, you have to beat the arenas, which means completing all of the arena challenges for both time attack and body count.