Uploaded by MrMysterious 
1280x720 PNG 916 kB
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Description:
Decided to showcase two different butt models, one is made by my friend Neoar2000 and the other was made by someone else. I figured it’d be a good call back to one of my earlier works that featured two different types of Twi playing around with Pinkie: https://derpibooru.org/1616548
It’s the butt model. The right’s model when the butt expands makes the cutie mark look like that.