Ep. 7: The Mysterious Monster Deco!

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Retsu has once finished his tough training, determined to get another Deco Stone. He then sees something shining in the mountains and thinks it is another Deco Stone as he decides to investigate it, but he returns scared. The Jewelpets in town knew that there was a strange monster terrorizing the mountains. Pink and Ruby ventured into the forest, to see if the monster exist and get another Deco Stone. (Source: Wikipedia)