So I've been wanting to do an age regression pic lately but I was having trouble figuring out how I should go about doing it. The question being: just how does age regression work with Pokemon?

Option 1: Evolution
The first option would be to use evolutions as a way of telling age. For example, Charmander is baby/child, Charmeleon is teenager, and Charizard is adult. They do look the part after all.

Example of this: https://www.pixiv.net/member_illust.....st_id=41805526

This is great and all, but I didn't really like having to be a Charmeleon for my more grown-up pics. I preferred staying as a Charmander as much as I could. And because of that, I found this second option:

Option 2: Size
Basically, the older a Pokemon, the bigger/taller he is. Basically like a normal furry, but might be hard to pull off a distinctive grown-up look with Charmander. If I could pull it off though, I prefer this. In Super Pokemon Mystery Dungeon, evolution didn't mean how old a Pokemon was; just how strong.

Example: https://www.furaffinity.net/view/24709287/

Conclusion
I would prefer Option 2, basically. If it doesn't work then I'll go with Option 1. What's your opinions on this dilemma?