Duplication: Not worth it

Ever since the second Dimension Doof has been defeated, peace is back in touch. But Phineas and Ferb invented a duplication ray, and Danny Fenton decides to test it on someone, but Isabella ends up testing it on herself, leading to 39 Isabellas, now Danny Phantom has to find a way to reverse the switch.

Trivia

 * This will mark the first time Candace will try to duplicate herself.