As a teenager, Elmo Sputterspark was fascinated with electricity and magnetism and, along with Drake Mallard, was tormented by the local school bully because of his "nerd" status. During a static-electricity experiment gone awry, Elmo's body became infused with so much electricity that he was able to harness its power and shoot it at any target he chose.
At the high school dance, he showed up in a yellow suit and tried to give himself the name Megawatt, but the band that was playing at the dance had the same name, so, to avoid ambiguity, he gave himself the name Megavolt. However, Drake Mallard had defeated him as Darkwing Duck, and since then, neither would see each other until many years later, and again on opposing sides.
Over the years, Megavolt became one of Darkwing's most formidable enemies, and would often be seen partnered up with Quackerjack. Both of them would also become part of Negaduck's group, the Fearsome Five.
Megavolt's greatest weakness is that he shorts out completely when he touches water. Because of this, Darkwing has defeated him numerous times when engaging him in battle.
- Megavolt's voice actor, Dan Castellaneta, would also voice Genie in The Return of Jafar, the Aladdin TV series, and the Kingdom Hearts series.
- "Duck Blind"
- "Comic Book Capers"
- "Ghoul of My Dreams" (cameo)
- "Up, Up and Awry"
- "Just Us Justice Ducks"
- "Life, the Negaverse and Everything"
- "A Revolution in Home Appliances"
- "Darkwing Duoubloon"
- "Dead Duck"
- "Twitching Channels"
- "Stressed to Kill"
- "Time and Punishment"
- "Inside Binkie's Brain"
- "Whirled History"
- "Jail Bird"
- "Inherit the Wimp"
- "The Frequency Fiends"
- "Clash Reunion"
- "Just Us Justice Ducks" (Disney's Colossal Comics Collection #5-6)
- "The Kitty Kat Kaper" (Disney Adventures Volume 2, Number 9)
- "Watt's the Problem!" (Disney Adventures Volume 3, Number 8-Disney Adventures Volume 3, Number 9)
- "Inversionary Tactics" (Disney Adventures Volume 4, Number 3)
- "Fluffy's Reign of Terror! - Part 2" (Disney Adventures Volume 4, Number 5)
- "Kitchen Clean-Up" (The Disney Afternoon #1)
- "Batteries Not Included" (The Disney Afternoon #3)
- "Megavolt Pulls a Switch" (The Disney Afternoon #4)
- "The Family Way" (Disney Adventures Volume 5, Number 2)
- "The Duck Knight Returns" (Darkwing Duck #1-4)
- "Crisis on Infinite Darkwings" (Darkwing Duck #5-8)
- "The Ballot of Darkwing Duck & Launchpad, Part 2" (Darkwing Duck #16) (cameo)
- "Dangerous Currency" (DuckTales #5-6, Darkwing Duck #17-18)