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Assuming that the orientation of the photo is correct, it looks like it may be based on a jouster. Perhaps Sirfetched will work similarly to shelmet and karrablast where you have to crosstrade it for it to evolve into a certain form. Sirfetched could evolve into a form that actually has a steed, which they cropped out of the picture to save for later. Looks like sirfetched could be holding the lance over his head in the picture
