This hoverboard doesn't have any unlockable upgrades.
Prickly is the eighteenth limited hoverboard in Subway Surfers. Like any other hoverboard, it protects you from crashing for 30 seconds. When crashed, the board will explode and will need to recharge for a few seconds before it can be used again. The hoverboard has the form of a personified cactus (probably a Saguaro cactus), with teeth, eyes, eyebrows and even a moustache. It was a special for the Mexico City edition. Like most of others limited edition hoverboards, Prickly costs 50,000.