Good luck finding that. There's a lot of stuff that's so damn vague with no sign that Kusaka will ever do anything to clarify them. And with such a large continuity, that's just infuriating.One thing I want from the manga is clarity. Some minor aspects of the manga are so vague.
Considering that Ruru stayed with Wally for 95% of RS and after being returned to Ruby had very little to do with Emerald, I'm really not sure why they didn't just have Ruby with another Pokemon and have Wally catch a Ralts instead of Kelcelon.Kusaka completely stripped Wally of all the good stuff he had but the least he could do was let Wally keep his identity. Ruby can find another Pokemon for his stupid contests. Stealing Kirlia was too far imo.