I'm debating between playing Diamond with a Dragon theme team or a Grass one.
Dragon will look like (at Lv. 60 pre-E4): Charizard
: Heat Wave, Shadow Claw, Air Slash, Brick Break Kingdra
: Surf, Waterfall, Ice Beam, Dragon Pulse Sceptile
: Leaf Blade, Iron Tail, Leech Seed, Crunch Garchomp
: Earthquake, Dragon Rush, Fire Fang, Stealth Rock Salamence
: Crunch, Fly, Zen Headbutt, Thunder Fang Dialga
: Roar of Time, Metal Claw, Earth Power, Heal Block
Grass (also at hypothetical Lv. 60 pre-E4): Torterra
: Crunch, Earthquake, Leech Seed, Leaf Storm Abomasnow
: Blizzard, Wood Hammer, Brick Break, Rock Climb Ludicolo
: Surf, Waterfall, Solarbeam, Fake Out Tropius
: Fly, Cut, Rock Smash, Synthesis (entry hazard instead?) Exeggutor
: Hypnosis, Dream Eater, Strength, Sunny Day Venusaur
: Toxic, Synthesis, Sludge Bomb, Leaf Storm (Petal Dance? Solarbeam?)
As mentioned, these are designed to be theme groups (meaning they vary within the constraints of sticking to one type or breeding group) and I spent most the last evening working the theory out and starting breeding work for both groups, which will be assembled and TM'd and HM'd up in tandem on Pearl before one goes to Diamond, once I restart the game...but I'm not sure which I actually want to do...