Tauonico

Tauonico is the final form of Electronio. It evolves from Muonico through trading. Unlike the earlier members of its evolutionary line, it is almost completely solid and therefore very, very heavy compared to the earlier members of its evolutionary line. Its stats are considerably balanced, and is a very formidable opponent. However, its Electric/Electric typing (yes, you read that correctly) makes it heavily vulnerable to Ground-type moves if it lacks Levitate. It also has a much larger movepool than its previous evolutions, making it a much better, and more useful, Pokemon.

Pokedex Entry
Tauonico

Ball Lightning Pokemon

HT: 3'11.5"

WT: 12.9 lbs

Being nearly-solid energy beings, Taunico contain massive amounts of energy within them. In most cases, this energy is close to 526 petajoules, although it can be greater.

Trivia

 * Like the two Pokemon before it, its body is based off of Gastly, although, like Muonico, its solid parts are taken from Voltorb. The concept itself is taken from the Tau (sometimes called the Tauon), an elementary particle and the heaviest of the Leptons.