Finally after a very long stroll through her archive I found the small TF Sketch of somebody's permanently smelly Toon Rat character who used to be a human. I saw someone made fan art of them and I tried to find this character's origin throughout the original creator's tumblr which I finally did. It's in the middle of a sketch dump but it's found in this page.
http://gummisputter.tumblr.com/tagged/rats-off-to-ya
Here's a bit more posts concerning this character.
http://gummisputter.tumblr.com/post/...t-say-anything
http://gummisputter.tumblr.com/post/...related_post=1
http://gummisputter.tumblr.com/post/...related_post=1
This person does some more toon based transformations around their tumblr like a toon character redrawing a woman into a toon orca (It's more of a poof).
http://gummisputter.tumblr.com/post/...ty-nut-nut-you
But it's a shame they don't really tag their post consistently, making it really hard to find specific pictures. So you'll have to go through the entire tumblr to find some more posts with TFs or implied TFed characters. But I really recommend going through their tumblr for more of their art as it's kinda funny and really interesting toon characters if you like toon tfs