Pikachu Two looks like all other Bidoofs, except that when Rusty becomes injured of hurt, Pikachu Two tends to have a smile that stretches the side of his face. Just like Pikachu, he seems to enjoy when Rusty is in pain. Rusty also pulled him along on a blue leash.
"Pikachu Two" (or Pikatwo) is seen as Rusty's new replacement, despite the fact that he declares that "Pikachu is irreplacble", and "Pikatwo" is, like Pikachu; he was seen being tied up with a blue leash while he was sleeping (it might have implied that he summoned him out from the Pokeball first). When he was "bought" to the Battlehaus, he was present in the "Battle Battle" arena. As Battle Bart began to punch Rusty, he cried out for orders, and he continues for being beaten, and "Pikatwo" enjoys the view with a smile.
After the Battlehaus was destroyed by Rusty from the behest of Bart, Pikatwo was also on fire, but Rusty, being oblivious to him burning to death, he happily whispered that he's evolving. Pikatwo was later dropped off at the Pokemon Daycare Center, but 30 seconds after dropping him off Rusty returned to ask Gladys if he had evolved, to which the answer was no, and she mentioned that "Pikatwo" is on fire, confirming that Pikachu Two was dead.
In Bidocalypse, Pikachu Two was most likely to die again due to Future Rusty's repeated actions.