Am I right when I say the case in Detective Conan Vol.12 with the shapes code wasn't turned into an episode?

In Detective Conan vol.12,Doctor Agasa takes the Detective Boys to a mansion of his uncle’s.There they find a strange code made of various shapes that Agasa says will lead them to a hidden treasure.Only instead,it leads to a robber who is trying to make counterfeit coins.Was this episode ever made into part of the anime series.

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