Slow Go

Slow Go is a badge in Paper Mario and Paper Mario: The Thousand-Year Door. In Paper Mario, it is found in a hidden room in Dry Dry Ruins, near the Super Hammer. In Paper Mario: The Thousand-Year Door, it can be bought from Charlieton for twelve coins. If equipped, Mario becomes unable to run, forcing him to always walk until the badge is unequipped. This does not affect him while he is riding Yoshi.

Merluvlee's prediction in Paper Mario

 * "I see...a Slow Go Badge. In the far depths of the ruins, there's a hidden room beyond where the Hammer lies. You climb up high, then land on the upper edge of the Hammer room. You walk carefully around to find the hidden chest."