>>46099229I doubt it's something to worry about any time soon. It took Red 20 years to go from 11 to 20-something. And some elderly characters haven't appeared lately at all. Take Agatha, for example. She hasn't shown up anywhere outside of the Kanto games. We haven't seen her at all since Red's journey, the first modern event of the Pokemon timeline(s). Other characters may simply stop reappearing after a point, like her.
Of course, Pokemon exists in a multiverse, so they can always do reboots in alternate timelines to retcon ages. It's all arbitrary really.
