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Deals damage and has a 30% chance to flinch the target. Does double damage when the target is under the effects of Minimize.
Although Steamroller seems like a decent move to use due to its relatively high chance to flinch the target, it is outclassed due to its low power and poor distribution. Sadly, no Pokemon with Serene Grace learn Steamroller.
X-Scissor is a more powerful alternative with no secondary effect.
Megahorn is a much more powerful but less accurate alternative with no secondary effect
Stomp is a Normal-type equivalent.