Please help me build a balanced Sapphire team

Hi guys,

Gardevoir: level 47+ Hardy
Psychic
Double Team
Future Sight
Calm Mind

Blaziken level 50+ Naughty
Bulk Up
Double Team
Slash
Blaze Kick

Mightyena level 25+ Bashful
Tackle
Howl
Sand Attack
Bite

My first message didn't go through, so I'll publish it again.
I'm looking for three more pokémons which would nicely complement my team. I'm also looking for better movesets for my existing pokémon team.

So far, I love the pokémons I've picked. They're fun to use, and I think that my Mightyena is going to be ridiculously strong once it's got better moves.

I'm desperately looking for a Normal or Ice Pokémon that's decent as I know that Normal Types have very few weaknesses. I'm trying to get a good team for the Elite Four. I just finished Lily Cove City.

I don't know what my team lacks, so far I've been able to beat all the opponents in the game pretty easily. I'm sure that there's something missing though, like a nice Ice pokémon.

Either Walrein or Glalie would be your options for Ice Types. Actually, they're pretty much your only Ice options.

Exploud or Delcatty are really the only decent Normal Types in Gen III.

Thanks a lot for your help.
Which pokémon would you pick for the sixth pokémon?
I think that normal and ice are safe choices. I doubt that getting a second normal pokémon would be good though.
Do you have suggestions when it comes to my first three little fighters?
I love them even more since the psychic gym. Mightyena really shined. :)

So far, their weaknesses:
1st
weakness
WATER
GROUND
FLYING
PSYCHIC

2ND
FIGHTING
BUG

3RD
BUG
GHOST
DARK

I think I picked them well since it's a casual team. I just need to be careful about that "bug" type.

walrein and Delcatty is what i usually used.

I may catch them once I'm done with the gyms then. The only problem is that I'd have three weaknesses to fighting, and I truly hate fighting-type pokemons when they're not on my team but on my opponent's team.
I thought about getting an electric pokemon, but I'm not a big fan.

Thanks a lot for the suggestions, I love how Ludicolo looks. Is Manetrik better than Voltorbe?
Do you know where to get Salamence or Flygon? I haven't met either of them yet.
Finally, which pokémon would you choose to replace Mightyena?
Preferably a pokemon with the same abilities or similar abilities, such as inflicting status or scaring other pokémons.
I did catch a Zombat level 40 that I could use but I don't know if it's any good.

Okay, thanks a bunch!
Would a Lairon do?
I can also catch a baby Aron (the first evol before Aggron) but I don't think I have the patience to make it level up till it's a Lairon level 40+