Talk:Las Vegas Official Bout/@comment-26333830-20190903190313/@comment-35539022-20190903191138

It's already been discussed but if I remember correctly, that's only there because of the event story. Apparently we (the player/Ritsuka) couldn't afford to enter Medjed's casino nor buy the letter of challenge associated with it. We entered anyways and attempted to challenge Nitocris without the letter and couldn't damage her at all whatsoever because it wasn't deemed "a legitimate and fair battle". So they kicked us out and later in the story, Ishtar shows up and offers to buy the letter of challenge for us in exchange for us completing some kind of favor for her.

The item in the shop is just there for exactly that, canon reference, lore reasons, shits and giggles, whatever you wanna call it.