You get them at the P2 lab, on route 18.
its called the P2 labritory and its near your home land
I have a feeling it is the boat u ride to the p2 lab for the genesect event.
TM24 (Thunderbolt) is located in the P2 Laboratory.
The high-tech dreamworld,the P2 lab, and the poketransfer lab...Just kidding, P2 and PokeTransfer are the same
you will get larvesta, a bug/fire type pokemon.
you go to the p2 lab
P2 is the secret laboratory for Team Plasma in Pokemon Black & White Versions. You can get different Drives for Genesect there if you have one. Drives change Genesect's type, by the way. Hope I helped :)
You have to surf from route 1, onto route 17 and navigate through the water current maze to get to the lab.
in the p2 lab
just check whole route 18 somewhere by the p2 laboratory.
Once you have Surf, take it through Route 17 to Route 18. Once you get to the house where the lady will heal your Pokemon, go up the stairs and across the bridge. Get off the shore and head out to the P2 Lab. Be sure to teach a Pokemon surf!