43 You need to use a Mafia Costume on your pet.

44 You need a pet that has learned 350 musical instruments.

45 You need to use a Limited Edition pet potion on your pet.

46 You need to complete level 25 or higher at the Pirate Mafia Mission.

47 You need a pet that has learned 400 musical instruments.

48 You need to complete the Pirate Mafia Mission.

49 You need to win Book of Daggers from Double or Nothing.

50 You need to receive a Limited Edition pet from any Gold Account Upgrade from the Account Upgrades page.