For own reference:
OK, took the Root fossil 'cause I like Cradily better, even though I'll never actually use it.

Is it possible to breed any good Fighting moves onto Aron? Because I have a female with a Gentle nature, so I can stick it in the Daycare and breed off of it.
While I'm at it, is there anything particularly good I can breed onto a Mudkip? I DO have a female, after all, so (again), Daycare.
EDIT: OK, nothing that will be particularly helpful here, though it is interesting to see that Aron can have both Body Slam and Smelling Salts bred onto it, allowing for a cycle of paralyze-mega damage-repeat. Might be useful for Final Four.
I put a list of a potential Final Four team on the last page, care to take a look at it again? (copied here for convenience)
Thinking ahead to Final 4, Blaziken can take the Ice-types and the Dark-types with minimal fuss, and I'm thinking of switching Grovyle for Cacturne, which should deal with the Ghost-types. I want an Ice-type of my own to deal with the dragons, which would you suggest? (Keep in mind what I can and can't get pre-Elite Four.) Finally, I can either use Cacturne on the Water-types and just deal with the damage, or, preferably, I need a Pokemon with an Ability that renders it completely immune. Is there anything like than in Emerald?
EDIT 2: OK, looks like Lombre with Mega Drain and Leech Seed is my best bet, I'll just have to remember to switch to Cacturne (Pin Missile/Needle Arm/Faint Attack/Spikes) for Tentacruel and the enemy Ludicolo (weak to Pin Missile). My Ice type will be Glalie. That leaves me with two Pokemon slots open, who do I use as backup?
So right now I have planned:
Blaziken Lvl. ~60 @


Nature
-???
-???
-???
-???
Cacturne Lvl. ~60 @


Nature
-Pin Missile
-Needle Arm
-Faint Attack
-Spikes
Lombre Lvl. ~60 @


Nature
-Mega Drain
-Leech Seed
-???
-???
Glalie Lvl. ~60 @


Nature
-???
-???
-???
-???

Lvl. ~60

Lvl. ~60
There's no-one that gets Water Absorb in Emerald before the Elite 4. Your best bet is to just train up something to take the damage, or, more preferably, take an electric type to the league and obliterate everything. =P
Blaziken Lvl. ~60 @ Charcoal
Any(Preferably Adamant or so, but it doesn't matter) Nature
-Sky Uppercut
-Blaze Kick(Might not activate on physical; stupid move categories based on type mechanic...)
-Earthquake if you can handle not using it on anything else(TM)
-Filler
Aggron Lvl. ~60 @ Leftovers?
Adamant Nature
-Iron Tail
-Dragon Claw(TM)
-Take Down(Replace with Double Edge if Aggron levels to 63 during fights)
-Brick Break(TM)
Lombre(Evolve after you get Hydro Pump, use a Water Stone) Lvl. ~60 @ Water Charm thingy. Charcoal's counterpart.
Modest Nature
-Mega Drain
-Leech Seed
-Hydro Pump
-Ice Beam(TM)
Glalie Lvl. ~60 @ Nevermeltice
Modest Nature
-Ice Beam
-Blizzard
-Water Pulse
-Protect
Flygon Lvl. ~60 @ Anything
Adamant Nature
-Dragonbreath
-Crunch
-Iron Tail(TM)
-Secret Power
Gardevoir Lvl. ~60 @ Magnet
Any Special Attack raising Nature
-Psychic
-Shadow Ball
-Flamethrower
-Thunderbolt
That helpful? =)