Models of Finn and jake from adventure time.
Both rigged, textured and exported in FBX format.
The .blend file contains IK constrains for both characters. (IK Can´t be exported to FBX unfortunately) Inside The blend file you can find both the versions with IK constrains and without (IK just makes it easier to animate, but both versions can be animated just fine)
The faces can be moved through the shape keys sliders as shown in the image.
Best of luck in your projects :)