Hey, so I just got this game and I was thinking about running the ILs. After 100%'ing the non-bonus levels, SpongeBob gains the abilities of all the other characters. Am I allowed to use this version of SpongeBob on the ILs? Or do I have to use the regular SpongeBob?

Also, the game has a customizable difficulty setting? What difficulties are allowed?

Edit: Ok so apparently, the "Super SpongeBob" is only active in Bonus levels. But I'm still wondering what difficulty should be used.