>>44430794Pokemon grow old and can die of old age. Its happened recently as well with a Stoutland. In terms of technicals it means Pokemon normally don't evolve by aging (Baby Pokemon might be the exception), but they strictly evolve by fight or flight responses/battle experience.
Lastly, Pokemon probably have SLIGHTLY different appearances when dealing with ages, a pokemon between ages 1-10 might look different from one that's 15-30 and so on.
