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Geno Flash is the final and most powerful attack Geno learns in Super Mario RPG: Legend of the Seven Stars. He learns it at Level 17 and it uses 16 Flower Points. To time correctly, the player must press and hold until the third star appears. Geno transforms into a cannon and shoots a ball of energy at all opponents. Upon contact, the ball rapidly causes a large explosion that depicts a sun. The sun continues to grow larger until it fills the screen, then suddenly discharges, causing severe damage to all enemies.
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