From the Super Mario Wiki
An Ice Storm is an item found in Paper Mario: The Thousand-Year Door. It can be purchased at Pungent's Shop and Keelhaul Key for fifteen coins and Fahr Outpost for six coins. The item produces a cold storm that attacks all enemies. An Ice Storm deals three damage to all enemies (unless the enemy is ice based), and may possibly freeze them. If used against fire based enemies, it deals an extra damage point and freezes them more likely. If used against ice based enemies, the enemies will gain HP. Ice Storm can also be cooked by mixing a Fire Flower and a Point Swap.
In Super Paper Mario, this item does much more damage to enemies depending on how much the bar is filled from shaking the Wii Remote. It is twice as powerful as a Fire Burst, dealing two damage for every segment filled. It is sometimes dropped by Frost Piranhas.
Names in other languages
||Tormenta de Hielo
||Jelly, but also a pun on gelo (frost)