Mod here:
Following up on my last post, it turns out that Poor Yorick did design a cutie mark for Blueball Blitz, so that is the one I will be using in the future, if I need to show her mark.
http://www.derpibooru.org/37155?scope=scpe06a571b971462f8f0207f18635643ba640517a7c
-PluckyNinja (blog mod)