It's practically the same as Anastasia but with Animaniacs, yakko lost his memory and forgot that he was a prince and wakko and dot his younger brothers are still looking for him in Paris, yakko was in Russia Looking at the castle that was once his home, he found Pinky and Brain who quickly recognized him

Brain: "You are yakko! Yakko Wander! The first son and king of Russia!"

Pinky: "It can't be all of Russia that thinks you're dead!"