Flying Using Chickens
On Mercay Island, at the docks, there are a lot of chickens running around. If you manage to catch one (lead it into a corner so it can't escape) tap it to pick it up. Next go to the south-west corner of the docks and there is a little island over some water. If you walk into the sea carrying the chicken you can glide across to the island and go up the steps there is a treasure chest up there.
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