This hoverboard doesn't have any unlockable upgrades.
Pumpkin is the thirteenth limited hoverboard in Subway Surfers. Like any other hoverboard, it protects you from crashing for 30 seconds. If crashed, the hoverboard will explode and need to recharge for a few seconds before using again. The board has the picture of a jack-o-lantern's face. It was released during Subway Surfers World Tour: New Orleans and re-released during Subway Surfers World Tour: New Orleans 2014. It can be bought for 50,000, just like all other limited hoverboards.