I don't think this one has been done yet.

What CAN be revamped:
- Movesets (TMs and levelsets) - For TMs, please post the existing list even if you're making no changes, it makes my job much easier.
- Abilities
- Egg Moves (POST WITH FATHERS, PLEASE)

What CANNOT be revamped:
- Base stats

We're doing Growlithe -> Arcanine in this topic.
Gen 3 info can be found here:

http://www.serebii.net/pokedex-rs/058.shtml
http://www.serebii.net/pokedex-rs/059.shtml

I suppose I'll start with a first draft of a new level up list for both:

Move/Growlithe/Arcanine

Burnout/x/-
Bite/-/-
Roar/-/-
Ember/7/-
Leer/13/x
Odor Sleuth/19/-
Take Down/25/x
Flame Wheel/31/x
Soul Burn/x/31
ZigZag/37/x
Ambush/x/37
Agility/43/x
Flamethrower/49/x
Extremespeed/x/49
Temper/x/55

Abilities: Intimidate / Flash Fire


I feel like there's a lot we can do with Arcanine as far as moves, but I want to see how IB feels as far as how much this moveset is able to be opened up, if at all.