Ranma ½ Season 1, Episode 10

P-P-P-Chan! He's Good for Nothin' · Fuji TV · Friday, June 30

Not knowing that it's Ryoga, Akane adopts the little black pig as her pet, naming him P-Chan. This of course drives Ranma crazy, as he desperately wants to get Ryoga away from her, yet feels honorbound not to reveal the secret.