Wild Smurf was introduced in version 1.2.1 (iOS) and is only available on the island for 30 Smurfberries.
Wild Smurf works similar in regards to the palm trees on the island to Nat Smurfling in regards to flowers on the mainland. Buying him unlocks all of the available fruits that can be grown on the palm trees (for more information see the article: “Growing fruits on palm trees”), thus bypassing the need to be given the seeds as a gift from neighbours/friends.
Moreover, he also unlocks the bananas, which are exclusively available via Wild Smurf and cannot be unlocked any other way.
Wild Smurf has a “Harvest All” feature for the palm tree and if his mushroom house is upgraded for 10 Smurfberries he also offers a “Plant All” feature for the palm trees similar to Nat Smurfling and Farmer Smurfs “Harvest and Plant All” features.