Help for my Sapphire team.

[Porygon Z]

Suggest me something to get better, or replace on my team. No EVs.

Blaziken - Fire Punch, Brick Break, Sky Uppercut, Flamethrower
Crobat - Sludge Bomb, Fly, Steel Wing, HP Bug
Aggron - Strength, Iron Tail, Dig, Solarbeam
Flygon - Dragon Claw, Secret Power, Earthquake, Crunch
Wigglytuff - Shadow Ball, Sing, Body Slam, Thunderbolt
Crawdaunt - Surf, Swords Dance, Facade, Ice Beam

They're all around lv. 63-64.

And also something for my Battle Tower team.

Metagross (@ Leftovers) - Psychic, Meteor Mash, Toxic, Iron Defense
Banette (@ Magnet) - Will-o-Wisp, Shadow Ball, Rain Dance, Thunder
Salamence (@ Charcoal) - Fly, Headbutt, Flamethrower, Dragonbreath

 

[Bankaiglade]

Well.....Blazikens Fire Punch move could be replaced with Its SIGNATURE MOVE,Blaze Kick or sunny day so it can back up Aggron`s solarbeam. Crawdaunt`s a water & dark type so it could know (replace with facade if ya want)crunch instead of flygon. and flygon could know dragon dance or sandstrom...And,Tell me....What held items do your pokemon have?

 

[Weavile05]

Suggest me something to get better, or replace on my team. No EVs.

Blaziken - Fire Punch(I would replace it with Blaze Kick, cuz you don't need a Heart Scale. It's really up to you though), Brick Break, Sky Uppercut(Aerial Ace), Flamethrower
Crobat - Sludge Bomb, Fly, Steel Wing, HP Bug
Aggron - Strength, Iron Tail, Dig, Solarbeam(Special Attacking move on an Aggron?)
Flygon - Dragon Claw, Secret Power, Earthquake, Crunch
Wigglytuff - Shadow Ball, Sing, Body Slam, Thunderbolt
Crawdaunt - Surf, Swords Dance, Facade, Ice Beam

They're all around lv. 63-64.

And also something for my Battle Tower team.

Metagross (@ Leftovers) - Psychic, Meteor Mash, Toxic, Iron Defense
Banette (@ Magnet) - Will-o-Wisp, Shadow Ball, Rain Dance, Thunder
Salamence (@ Charcoal) - Fly, Headbutt, Flamethrower, Dragonbreath

My comments in bold. Overall, pretty good though.

 

[Perriechu]

Suggest me something to get better, or replace on my team. No EVs.

Blaziken - Blaze Kick/Flamethrower, Aerial Ace, Sky Uppercut, Earthquake

Going with what everyone else said Blaze Kick over Fire Punch for more power, or just use Flamethrower, Aerial Ace over Brick break as Sky Uppercut already does the job better, Earthquake to replace one of the fire moves.

Crobat - Sludge Bomb, Fly, Steel Wing, Confuse Ray

HP Bug wasn't needed, it can only hit Psychic/Dark but Crobat shouldn't be going up against them, if your really desperate for HP bug, forget Steel Wing, Confuse ray can help you out of a tight stop.

Aggron - Strength, Iron Tail, Dig, Take Down/Aerial Ace

Solarbeam is terrible for Aggron, Take Down can be powerful since you won't take recoil damage (depending on your ability) or Aerial ace if your going with Sturdy.

Flygon - Dragon Claw, Secret Power, Earthquake, Crunch

Secret Power needs to be replaced with something, but I'm not exactly the best with Gen III n.n; Maybe try Iron tail?

Wigglytuff - Shadow Ball, Sing, Body Slam, Thunderbolt

Nothing wrong with Tuffeh here,

Crawdaunt - Surf, Swords Dance, Facade, Ice Beam

Same with Crawdaunt ~

They're all around lv. 63-64.

And also something for my Battle Tower team.

Metagross (@ Leftovers) - Psychic, Meteor Mash, Toxic, Earthquake

E-Quake > Iron Defence all the time.

Banette (@ Magnet) - Will-o-Wisp, Shadow Ball, Psychic, Thunderbolt

Psychic > Rain Dance, it cripples Flamethrower Thunderbolt > Thunder

Salamence (@ Charcoal) - Fly, Headbutt, Flamethrower, Dragon Claw

Dragon Claw not breath,

Comments and suggestions are in bold, also who ever said remove Sky Uppercut and not Brick break; shame on you u_u

 

[Weavile05]

Comments and suggestions are in bold, also who ever said remove Sky Uppercut and not Brick break; shame on you u_u

I said to use Brick Break instead of Sky Uppercut because of BB having Higher Accuracy and breaking light Screen and Reflect.

 

[Dude22376]

And also something for my Battle Tower team.

Metagross (@ Leftovers) - Psychic, Meteor Mash, Toxic, Iron Defense
Banette (@ Magnet) - Will-o-Wisp, Shadow Ball, Rain Dance, Thunder
Salamence (@ Charcoal) - Fly, Headbutt, Flamethrower, Dragonbreath

You won't get far with this team.
Firstly, never use the +10 items (Magnet, Charcoal). They never boost enough to be considered useful.
Individual member comments:
Metagross: Why such a mixed moveset? You have special moves, physical moves and stall moves. Since EVs are limited you're either going to end up not KOing things that you could if you were to focus solely on one attack stat, or unable to survive attacks that you would if you were to focus solely on stalling.
Banette: Mixed moveset again. Rain Dance doesn't benefit your team mates, and Thunder doesn't hit the Pokemon that you would have trouble with for super effective (Normal and Dark types). Banette is not the strongest ghost Pokemon you can use - Gengar is much better.
Salamence: What is Headbutt for? It doesn't get STAB and can't hit anything for super-effective.

An example of a good team would be the Starmie-Metagross-Salamence team:
Starmie Surf/Psychic/Ice Beam/Thunderbolt
Metagross Agility/Meteor Mash/Earthquake/Explosion
Salamence Dragon Dance/HP Flying/Earthquake/Flamethrower
Distribute Lum Berry and Leftovers as you wish, and pick a random item for the third. You can even use Choice Band on the Salamence if you replace Dragon Dance with something else.