Nesigi is a genetic experiment gone RIGHT. It happened when Dr. Eggman was trying to create a better sugar snack to make himself even more obese, but instead created something weaker, faster, and worse than Lucario, which immediately broke free and cloned himself multiple times in the wilds of the Isle of Stupidity, where Eggman built his laboratory. After breaking free, Lucario joined in with all the freaks who think they are Pokemon, although he was not REALLY a freak. Since Nesigi was made by Dr. Eggman, he is part jackal, part robot, and has some of Bruce Lee's DNA.