[quote=@Prince of Seraphs]
<Snipped quote by ProPro>

 As for the move limit it could be looked at as an animal being unable to remember certain tricks it is taught when they become irrelevant while learning a move like Flamethrower could be seen as the Pokemon becoming more adept at what used to be Ember.
[/quote]

The second part of that makes sense and is what I'd be going for. I.E. General fire projection begins at Ember, becomes flamethrower, eventually becomes Fire Blast. The first part of that doesn't really gel with me, though. Pokemon are consistently shown to be nearly as smart as people (or significantly smarter, in some cases). There's not really a reason that memory would factor into a move limit. So what I'm aiming for is a general description of abilities which includes the current cap to their progression, the highest level technique that they would know in a given field (I.E. Flamethrower being the strongest fire-type move charmeleon knows, Double-slap being the strongest normal move clefairy knows, etc.)

Edit: Oh, and just for the record, the above is just an example of how I would like to run it, not the specific move limits. Flamethrower would require charmeleon to be at more than twice the level I intend for him, so no way in hell he'd have that off the bat.