Hmmm a Sinnoh fan... I always think that region is heavily underappreciated. Aside from all that, it's a great pleasure to welcome you to the forums, Dialga!
I always found Dialga one of the most beautiful mascot legendaries, and could be why I always liked Diamond better even when I was forced into playing Pearl by my brother. Sadly, Primal Dialga will never be a thing outside of Mystery Dungeon, but it's something interesting on its own in those games. Any plans as to which sections here are enticing you? I'd be happy to show you but do tell us more about yourself so I can find spots to check out.
Hopefully you're having fun, and do ask a staff member if you have questions but anyone is always willing to assist you. I do hope you can stick around and see you around for now!
- Hikamaru