I played Explorers first back in 2008 and only played RT in 2012 so I didn’t know how much of a blessing making evolved pokemon recruitable in Explorers was until then….
Speaking of recruitment, I used the wonder mail generator to create challenge letters from Jirachi in the Side Path, Rock Path and Forest Path, and then accepting those letters actually permanently unlocked those dungeons for me with (seemingly) no strange side effects! Furthermore, revisiting the paths this way actually enabled normal recruitment in them, something that nobody online seemed to know at all! I also generated Jirachi challenge letters for each of the future dungeons and that actually unlocked them permanently too! Unfortunately, unlike the paths, recruiting was still banned in the future dungeons :(
And one more thing, after I unlocked the paths and the future dungeons via this method, jobs for them started appearing normally on the guild’s bulletin boards and I could complete them without issue, which was pretty interesting. But The Nightmare, demo dungeons and special episode dungeons failed to unlock with this method, and normal Hidden Land and Temporal Tower didn’t work, but Hidden Highland and Temporal Spire did work for me and I could go to them from the crossroads