Animal Crossing: Wild World/Wendell, a starving artist

Wendell is a walrus with a love for painting. Unfortunately, it would appear that Wendell doesn't make many bells, as he is always starving. When you find Wendell wandering around your town he will ask you for something to eat. If you give him some food he will reward you with a special pattern. The type of pattern you receive is based on what piece of food you give him. Certain patterns can only gained during certain seasons; this is because some fish or other edible items can only be found during particular seasons.

If you give Wendell a red turnip, he will give you a country guitar or a turban. If you get the turban, give it to Saharah. If you get the country guitar, give it K.K Slider. This is part of the long line of trades required to get the Golden Axe.
 * Golden Axe trades

Rewards
Here is a list of designs you can receive from Wendell based on what item you feed him.