When you give him Blue Elixir (found in different places, sometimes with Ghost Ray), he gives you 60 coins as reward (with a maximum of 10 bottles per time, after that you have to wait about an hour, to give it to him again) and sometimes a Special Moves scroll, Emotes or other rewards such as a Skateboard. He is also stars in some missions you can play with the games in your backpack (see articles Blocks, Bounce, Combo Drop and Flight for the missions).