☆ Given that he entered at ~age 19 and it's nearing three years so he's ~22-ish, in ten years Ryner will be approximately 32 years old, give or take. The spitting image of his father, except with brown hair and eyes.
☆ Depending on exactly how canon ends, he'll probably have been eventually canon updated to the end, but I could leave it off at around volume 12 of the sequel or something, idk yet.
☆ He'll have the entire set of Johto badges as well as the elite Viridian badge, solely for the sake of getting the SS ticket. The rest? Why bother with the rest?
☆ His team will still have eggs twice a year, which he'll have begrudgingly accepted as just a thing.
☆ However, he'll have spent most of his time doing research into legends and the like.
☆ If there are ever any travel opportunities to other regions, he'll have obviously taken them. ...Though Striation City makes him uncomfortable, for reasons.
☆ He'll have eventually gotten an actual house with Sion, probably somewhere between Goldenrod and Ecruteak. Don't quote me on this, but I'm thinking something with lots of room for the mons and for libraries, with just a couple of small rooms for the actual human occupants. And definitely a river running through the property with lots of wild Magikarp that hang out that Ryner feeds bread to. Like a koi pond or something, except that they'd be able to come and go at will.
☆ His team... let's be real, he'll probably at least double its size over time, but he'll never hit the box limit. But between grandkids and new rescues and Rose being Rose, he'll probably end up with an even more varied menagerie.
☆ ...Okay seriously, around year 7 Rose would have definitely dragged him to dango-making lessons even despite the kitchen issue.
☆ He'll never be 100% used to Johto though, and will always just be expecting that any day now, it'll all be over.