Minecart Upgrade Kit

The Minecart Upgrade Kit is an Expert-exclusive consumable item. When used, it permanently unlocks a boost for all minecarts, including speed increase, extra defense when moving, and a laser attack. It also gives the player a Mechanical Cart.

The Minecart bonus can be toggled via a button in the top-right corner of the Minecart slot in the equipment menu.

Trivia

 * The minecart boost provided by the Minecart Upgrade Kit is identical to the Mechanical Cart's effects in versions between 1.3.0.1 and 1.4.3.6.
 * The minecart boost will be automatically unlocked for characters that have a Mechanical Cart in their inventory or equipment slot.