I don't really have any major grievances with Pokemon, but I'd just like to throw in my input as to why Satoshi, (Japanese name for Ash Ketchum), doesn't grow old, (& I am actually GLAD ABOUT THAT)!!
Interview with the person who introduced Pokemon into our universe, Satoshi Tajiri, answer highlighted wrote:
TIME: The main human guy is named Satoshi. That's your name. Is he your alter ego?
Tajiri: Basically, he's me when I was a kid.
In other words, my educated opinion as to why Satoshi/Ash Ketchum doesn't grow old, (I could potentially see him growing UP, ESPECIALLY if it was/is a Mega-Evolved, (in other words, TEMPORARY), state), is because he is someone's CHILD-SELF, & how can someone's child-self very likely grow old?!
(Well, on the other hand, even Peter Pan, who after all is an archetypal example of an eternally youthful boy,
DOES grow into a middle-aged man, (& loses his memories), in the Robin Williams Movie "Hook",
so it COULD happen in some versions of the Pokemon Multiverse, but I would do my utmost best to IGNORE those kinds of universes like THE PLAGUE)!!
Source-Interview for the above-mentioned quote, (specifically on the 2'nd page):http://pokedream.com/pokemon/infocenter/tajiri.php
in a Pikachu short (not sure which one though) he says to Pikachu "Do You Know What Today Is Pikachu?, It's The Anniversary Of the Day We First Met" which would imply at least a year passed but then in the next season Ash is still listed as 10 years oldhttp://img.memecdn.com/ash-twilight_o_920042.jpg
I'm not sorry.
Or maybe he is a child-of-the-forest, similar to Peter Pan, & some versions of Link:Also, originally, Satoshi's/Ash's partner Pokemon wasn't going to be Pikachu in the anime, ...but... CLEFAIRY,
like as in Tinkerbell/Tatl/Tael/Navi/Ciela/any other Fairy Partners of Link, (although Tinkerbell was/is with Peter Pan, & Tael was with the Skull Kid)!!
Also, Pikachu is partially of the Fairy-Egg Group!!
I would personally prefer it if he had BOTH a Pikachu, as well as a Clefairy, & here's the way I see that potential scenario playing out:
Satoshi/Ash Ketchum gets a Clefairy from the Professor in Kanto, & finds a Pikachu under his floorboards, when he gets back home,
(much like in the Pokemon Dengeki Pikachu Manga),
so he gets 2 STARTER Pokemon!!EDIT:
Also, he lives rather near Viridian Forest!!
Maybe he is a Viridian Child, like as in the Pokemon Special/Adventures manga, especially since he is later revealed to have the Power of Aura?!
(Although technically, Pikachu *WOULD* be more appropriate than Clefairy, following that logic, in a sense, seeing as you can find wild Pikachu's in the Viridian Forest, in Pokemon Red/Green/Blue/Fire-Red/Leaf-Green, & you cannot, (@least under regular circumstances), find wild any wild Clefairy, in that location, but I would still prefer he have both a Pikachu, *&* a Clefairy)!!
Also, he gets his starter Pokemon('s) from a person who has the name of a certain type of tree, in most versions of the Pokemon Multiverse that we know of, (OAK), similar to the Fairy/Deku Tree, although to be fair, ALL of the Pokemon Professors share their names with trees, @LEAST SO-FAR!!