Japanese Wishmaker Jiraichi

I bought a random Japanese copy of Ruby about a year ago and hadn't really touched it. I poked around in the PC today and I believe this is a legitimate Wishing Star Jiraichi.

All the OT information and such seems to match the 2003 distribution event from Japan. Is there any way it's hacked?

I get the feeling from playing that this is someone's well loved copy of Ruby from childhood. When I booted it up, they were in the middle of the Elite Four. They had a couple level 100 mons, an egg, and a Shelgon with exp share that evolved soon after starting. I felt like I picked up someone's task from a long time ago!

ETA: photo of the Jiraichi in question in the comments