Forum:How did Myotismon get the Crest of Light

If Devimon hid the tags under the ocean and the crests all over Server, then how did Myotismon get the Crest of Light before the series started? Were Devimon and Myotismon working together? Did Devimon give Myotismon the final tag and crest once it was confirmed that one of the Chosen Children was missing?