Repel Gel

Repel Gels are rare items in Paper Mario. The gel makes Mario invisible for two turns, causing enemy attacks to go right through him. They can only appear in a few select areas, such as in a hidden block in Jr. Troopa's playground behind Goomba Village, in a ? Block in Gusty Gulch, in a hidden block near the shore of Jade Jungle, behind a tree in Shiver Snowfield, and by paying Rip Cheato sixty four coins for the fourth time. They are also dropped by purple question mark Li'l Oinks.

In Paper Mario: The Thousand-Year Door, the Repel Gel is replaced by Repel Cape and Boo's Sheet which are much more common items.