Magic Butterflies, Bottled Water, PSI Caramel, Magic Truffle, and Brainfood Lunch, although all of those except the Magic Butterflies aren't avaliable until later in the game. The Magic Butterflies are found anywhere, flying around. That means you are going to have to rest up in the hotels to replenish your PP conserve your PSI wisely.. although Frank isn't too hard, people can beat him at just level 2. He is cake at about level 6.
And I quit Earthbound in the middle also, when you control Jeff at Snow Wood, but because Spring Break was over and I had to give up the SNES! I got it back during Christmas break and beat the game... and its one of the very few RPGs I like. I think its because I don't like RPGs set back in the middle ages and such.