30th anniversary of anime or games? If it's anime, then nope since it's 2027.Based on that, Gen 10 will come and new protagonists will arrive. If you think Pokemon's in general. Then that would be 2026 which IMO it can happen since I believe Gen 10 will come in late 2026, which means this gen will be 4 years. 2006 is year when DP (Gen IV) came and 2016 is SM( Gen VII), So I think logically for 2026 it's gonna be Gen X new games.
But I think that'd be little late to interact. I think Ash will appear before that multiple times starting 2024.
