Professor Juniper's Accelgor

Professor Juniper's Accelgor was the third Pokémon owned by Bianca, however, it was traded for a Karrablast shortly before evolving.

Biography
Accelgor first started off as a Shelmet in BW051: Enter Elesa, Electrifying Gym Leader! when it was originally Bianca's third Pokémon. It fought against Elesa's Zebstrika during Bianca's Gym battle. It fought hard with its Acid and Energy Ball attacks until it was defeated.

It later appeared in BW065 where it was traded for Professor Juniper's Karrablast.