I know that Power Whip is more powerful with low accuracy, and Energy Ball is boosted with the Special Attack stat. But I'm trying to have a move to counter ground types. If Power Whip, what item should I put on?
Probably Energy ball
Its attack stat is GARBAGE but a special stat of 173 is mega good
Also to make it destroy ground types more try a scarf
also grass is a good type for rock and water types too,
better on a rock water type