Which item do you need to make Shaymin evolve?

You need a gracedia. You can get it by talking to a lady in floroma town with a shaymin in your party. _____________________________________________________________________________ Felix Wang's Answer: You will need a Gracedia Flower and you get it by a lady roaming outside with blonde hair in Floroma Town. You will need a shaymin in your party that you got by a TRUE. ( Toys R' Us Event). The event has passed now but you may use other people's shaymin to envolve. And when you get the flower, you may give it to any shaymin (doesn't have to be from a TRUE). That's how you get an evolved form of shaymin (A.K.A - Sky form shaymin)!