Doctor Nefarious Tropy (Earth-6515)

"Well, haven't we gotten far for a pair of fuzzy animals. I am Doctor Nefarious Tropy, master of time and creator of the very Time Twister Machine you see before you. Uka Uka and Doctor Cortex have sent me to end this little charade, so you won't be leaving my area with the Chaos Emeralds. I swear it!"

- Doctor Nefarious Tropy

Doctor Nefarious Tropy, or N. Tropy for short, is the self-proclaimed "Master of Time" and quantum warp technology, which allowed him to discover time travel and even dimension-traveling to a much lesser extent. An old friend of Uka Uka, he was called upon by the spirit to help him and Doctor Neo Cortex take over the world. He is also a good friend of N. Trance.