Made by Neros Urameshi in the Pony Creator which was owned by [link]
A movie character in the Dasheresque series played by Twilight Sparkle. A famous deranged rocket scientist/sorceress, she kicked Dasheresque (Rainbow Dash) out of the space program in 'Dasheresque 0: The Awesomeness Begins' which has something to do with bringing bag of scorpions into space. The unicorn agrees to put aside her differences with the heroine to help remake the formula for saving cats in return for recovering a disk of important launch codes for Professor Egghead's rocket which was stolen by Lucille (Rarity), the formula was soon completed.
Later on, when Beautiful Fillymore (Fluttershy) has stolen a ruby for the rocket, Dasheresque went after her to get it back while getting the launch codes disk from Lucille. Once she succeeded and return both to Professor Egghead, the unicorn send Dasheresque into space to confront Party Bazooka (Pinkie Pie) and Tadaka (Spike) to save Tardis (Doctor Whooves/Time Turner).