Invincibility Potion

無敵

Item

From the manuals and magazines

For a few seconds you can defeat enemies by running into them.

Jack Bros. no Meiro de Hiihoo! instruction manual, Atlus, 1995, p. 22. Translated from the Japanese by 101Leafy.

This item will allow you to remain invincible for about ten seconds. During this time, you cannot be harmed by an enemy attack.

Jack Bros. instruction booklet, Atlus Software, 1995, p. 18