Negatron

The Negatron is one of the two fundamental particles of matter. A negatron represents all things negative and evil. Its opposite is the positron.

Megavolt's Tron-Splitter device separated matter into two objects, one composed entirely of just positrons, and the other entirely of just negatrons. When the device was accidentally used on Darkwing Duck, it caused him to be split into Posiduck and Negaduck. The negatrons in Negaduck were "galvanized" by another blast from the Tron-Splitter, causing him to become a powerful negative-energy being- the same was done to Posiduck so that he could defeat his antithesis, and they were eventually recombined.

References

• Darkwing Duck: "Negaduck" (1991)