If you have a Dabilahro at level 3, this fight will be easy. When the worm appears, it will shoot two electric balls at you. Just dodge them. Stay in the top left corner of the platform. As soon as he is done, charge Y. When he come out, he will either shoot a electric ball at you or try to swipe you with his body. If he shoots an electric ball at you, just before he shoots, release Y. This will take down 25% of its health. If it body swipes you, release Y when it is about to hit you.

You will jump over it and take down 25% of its health. When facing two electric worms, use the same method. Dodge the electric balls and charge up for an ultimate attack. If both worms are out while you attack, both worms will lose 25% of their health.