In the earth realm, the nights find Dopplefanger, a two-headed dog monster, guarding a grave. The grave was put up for Gabriolos, an angel that was banned from the upper kingdom and became a dark angel. Gabriolos attacks the knights, but Dopplefanger protects the knights. Gabriolos leaves and Eccentro attacks the knights with Rhino Rex. Dopplefanger is too injured to fight, but luckily, Rhino Rex is too stupid to attack and runs off. Gabriolos sees this and attacks again, but the knights combine with Dopplefanger and fight back, causing Gabriolos to leave again.
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Ready to Watch Mon Colle Knights, Season 1, Episode 15?