Test any custom Character. When Pressing Y to change your characters you will notice that the last line last few to the right will be labelled Custom A, B, C etc. There wont be any pics of a character on there. Select Custom a for example and walk a few steps fowards and there you go. Achievement Unlocked.
achievement Achievement guide Geoff Black Bottle Bricks Caribbean Chapter character characters Choice Collection Davy Jones Davy Jones Locker film gold bricks Guide Hope hub Isla Cruces Isla de Muerta Locations London Town London Town Hey minikit Norrington Pelegosto Pirate Pirates Port Port Royal Queen Annes Revenge Revenge Royal Ship Ship in a Bottle Singapore Smuggler Story The Black Pearl Tortuga Town Unlocked Walkthrough water Xbox