It was well scripted and cast no doubt. I really never cared for stage plays but this one defiantly was an exception for me. I've re-watched it several times.

There was no way Taichi knew about Metal Etemon true. The group had split up, Taichi's group dealing with Pinochimon's mansion and it was Joe and Mimi and their ragtag group along with Leomon that had to deal with him.