Costume Kingdom

This quest will become available after you've completed the first Apex (see The journey begin's). You pick it up from Bobby, who is located in the Forest area on the right side of the map:

Note this is a different encounter with Bobby than the one outlined in Because im big. Bobby will ask you to defeat Luke, who will be located in the tire area just North of the Park (additional note - there are two "Luke's", one in front of a house on the left side of town and one in the tire pit - the one in the tire pit is the one required for this Quest and will only appear once you have accepted the Quest). Defeat Luke in a battle and then return to Bobby in the forest. Talk with him to turn the Quest in, then the trophy will unlock.

You will acquire the Magicoon Costume/Hallowmon upon completing this Quest.