Well it's being held in Goldenrod. Meaning you can take the train here and once it's over, take the train back? So unless you are direly desiring being stuck in Johto, you would probably be safe visiting for the con. [[Just a friendly suggestion.]]

Well, visit the tailor there. I'll talk to a few of my friends and have them put in a word.

[[Or casually pay your tab, depending on if they can. She doesn't know how the tailor network works between Johto and Kanto....]]