So a way to grind out candies has been going around. It involves abusing the daily candy prize and setting the day forward. With the new hardware button Vita update you can scroll through the settings much quicker. Doing a quick stopwatch I can get around 20 seconds for 1 day change. This means 256 candies every 20 seconds or 768 candies per min. Depending on your speed it should take roughly an hour and a half of nonstop day changing to get the final item.