Mime Mr. Share or Macho Brace. Shield It manipulates the chemical makeup of its poison to produce electricity. The voltage is weak, but it can cause a tingling paralysis. The user must eat a held Berry to use this move. This lowers the target's Attack and Sp. Atk stats. This also leaves the target with paralysis.
There are, however, two different forms Toxtricity can take - Low Key or Amped. Toxel's unique evolution method involves you paying close attention to its nature. A Toxel with a calm, quiet, nature will evolve into a Low Key Form Toxtricity, while one with a more active, excitable, nature will evolve into an Amped Toxtricity. You'll be able to access this area after you defeat Milo the leader of the grass-type gym at Tuffield. If you want more Toxel, then you can easily catch them in both the Wild Area and Route 7.
Toxel - How To Get & How To Evolve