I'm pretty interested in Vikavolt myself. I've been trying out TR, and Specs Railgunbug is pretty stronk. Gets Thunderbolt, Bug Buzz, and Flash Cannon for fairies. The relative lack of fire moves flying around means it usually only has to worry about rocks, and it's not terrible defensively for a bug. I'm trying to figure out if I can throw in Tap Kok for the added power, or Pelipper for Thunder, but it's a little tough fitting it all into a team that works well, it seems easier to just take advantage of any enemy Kokos.
By the way, can anyone test on cart whether Choice items affect Z Moves? Like, can you use a bug z move after using Thunderbolt?