The Diamond Dogs and The Horrid Lorries is the twelfth episode of the fifth season of Yuna's Princess Adventure.


With The Diamond Dogs and The Horrid Lorries treat everyone and everypony badly, Princess Yuna and Emerald must do what they can to reform them and show them what's like to treat others fairly and equally.


  • This episode is based on Thomas and Friends episode, Horrid Lorries.


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