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Deals damage and has a 50% chance to lower the target's accuracy by one stage.
Leaf Tornado has little competitive use. Its Base Power and accuracy are too low, and it is outclassed by stronger moves, such as Giga Drain. The secondary effect of lower the target's accuracy is also unnecessary, as lowering accuracy is an unreliable strategy.
Giga Drain is a more powerful option that restores HP.
Energy Ball is a more powerful option that has the chance to lower the opponent's Special Defense stat by one stage.
Leaf Storm is a much more powerful option that lowers the user's Special Attack by two stages upon use.