Veil

Veil was an attack that Vivian mastered during the events of Paper Mario: The Thousand Year Door. It came by default, and was a useful attack. It used 1 Flower Point, and hid Mario under the shadows, So every enemys attack missed. The same technique can also be used outside battle, too. The only drawback is that neither Mario or Vivian will be able to attack the next round.

Also Lady Bow used a similar attack called Outta Sight this attack is very similar to Veil. For a small price of Two FP Bow will make Mario Invisible. Bow could use can use this attack out of battle.