[10,000 Volt Ghost]

That probably is the hardest part of the game. I always felt like part was scaled to be okay with Ness and Paula but not just Ness by himself. The first time I played through the game Paula died and I didn't know you could revive her by staying at an inn. I had to beat that stupid mole with Ness only and a dead teddy bear. The stone revived Paula and made it easier again.