The Japanese version of the game contains an extra ARC that was removed from later releases, named message.szs. Its only contents are two message files, named station.bmg and system.bmg. One contains a list of stations and harbors for the levels, while the other contains dialogue for buying tickets and getting them stamped. As a number of the locations listed are landlocked, it must be concluded that these files belong to a scrapped train system for the island. Given the locations listed, this would have been the primary means of accessing levels in the game. Pinna Park is among the listed locations, as are several other presumably island locations. This implies that either there was a bridge to Pinna Park, the train is a subway, or that Pinna Park was not always on the tail island.