New for this year is an AI difficulty slider with 110 increments instead of the seven available in last year's game. (gtplanet.net)
Meanwhile, The Ultimate Choice taking inspiration from Kid Icarus: Uprising «s Fiend's Cauldron difficulty slider makes for an interesting Arena replacement, but Guest Star???? Star Allies Go! (heypoorplayer.com)
The problem with this is that there doesn't seem to be enough notches on the invisible difficulty slider — I often found myself finishing 3 levels in a row without a single death, followed by getting my backside handed to me on a level. (psnstores.com)