Geno Boost

Geno Boost is one of Geno's spells in Super Mario RPG: Legend of the Seven Stars. It will boost the selected character's Attack, and if timed right, the Defense. It is a Time Level 1 attack. When you use it, red arrows pointing up appear above the character's head. To time it, press any letter button right after the arrows vanish. If you did it, a thunder effect will ooccur. If it isn't timed right, "Attack Up!" will appear with no thunder effect. If you timed it right, "Attack Up!" and then "Defense Up!" will appear, including the thunder effect.

Effect
When you use this, the attack, or both the attack and the defense will go up to the end of the fight. After you beat the enemy, the character's stats go back to normal.

Nullification
Because that attack can be a serious problem for some bosses, like Culex and Smithy, they can use Shredder, which normalizes all of your boosted stats.