Ran into an issue with 2DTK: I needed an animated sprite, that is, I want to use the TK2D Sprite Animator component. I tried attaching that to a "Toolkit 2D Jelly Sprite" and got the following error: Code (csharp): Sprite not found attached to tk2dSpriteAnimator. UnityEngine.Debug:LogError(Object) tk2dSpriteAnimator:get_Sprite() (at Assets/TK2DROOT/tk2d/Code/Sprites/tk2dSpriteAnimator.cs:137) tk2dSpriteAnimator:OnEnable() (at Assets/TK2DROOT/tk2d/Code/Sprites/tk2dSpriteAnimator.cs:116) Basically, the animator can't find the sprite. Looking at your tk2dJellySprite.cs it seems the issue is that that class isn't based off of BaseSprite - seems like you're just making a wrapper. Works ok for a static sprite but not if you want an animation. I'm going to try to see if I can find a workaround... or am I doing something wrong?