|Gallopolis, man to the north-west||Furry Finery Recipe Book|
Once you reach Gallopolis, head to the north-west of the city to find an Artist looking for inspirtation. He comes up with the idea to create a battle piece, one which he needs you to help him with by using Wild Side.
Head out into the desert once you're on the hunt for The Slayer of the Sands and search near the ruins to find Spitzfires. Once you have the Hero, Erik and Serena all Pepped up then use Wild Side, this will boost Erik's stats and give him two turns a combat round. Simply defeat the beast with this active to fulfil the requirements asked by the Artist.
The difficulty in this quest comes from getting all three characters Pepped Up. The best way to achieve this is to defend in a battle until one by one they're all Pepped Up. This however is still not enough sometimes, no matter what you do you won't have all three Pepped Up at the same time. For this reason it's best to wait until you get your fifth party member, you can then remove one of the Pepped Up characters while you wait for the other two to reach the state. Your characters will retain their Pep status even if they're not in the main party.