Nefarious Tropy, commonly called N. Tropy, is a time-traveling evil scientist from the Crash Bandicoot series. He is a self-proclaimed master of time and the inventor of the Time Twister Machine, which is a time machine. He was first introduced to the series as working for the evil mask Uka Uka alongside Neo Cortex to achieve world domination in Crash Bandicoot: Warped. However, he has also worked independently from or against them in some games, and partners with other evil characters as he pleases. N. Tropy's name is a pun on the word "entropy", a property of physics representing chaos or randomness.

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