I need some help w/ emerald team

[C Sherbii S]

I think I need some help with my emerald version team. It is as follows:
Kecleon lvl 30 (not sure if I want her on my team)
Mightyena lvl 34
Swellow lvl 33
Blaziken lvl 37
Azumarill lvl 33
Manectric lvl 35

Pok?Dex: 54
Time: 25:50
Location: Lilycove
Badges: 6

Please make recommendations on what I should have on my team. I am not too sure about Kecleon, although I like its color change, i bet it can be a real pain some times.
Any help is greatly appreciated.

 

[[(Vash the Stampede)]]

Well, it's not so bad... The sad side of the tale is that, in fact, you can't defeat the Elite four with that team... u need AT LEAST lvl 55 or higher...
And throw away that Kecleon... :P
It just...don't work...

 

[Bliksem]

Uh... no you don't. My Pokemon average mid-40s at the start of the Elite Four, and I have no problems with them.

As for the team, let's just say I detest Mightyena. I trained one, but its stats are so low and it doesn't learn any really good techniques besides Crunch. And Crunch only comes at high levels, and Mightyena's special attack power is poor.

Kecleon is also poor, in my opinion. It seems like one of the novelty Pokemon that really don't have much of a use in battles. Like Spinda, for example.

Swellow, Blaziken, and Manectric are all good. You can do well as long as you teach Manectric Thunderbolt.

Azumarril, I'd replace with something else. Tentacruel or Starmie would be good choices, I think.

I'm really working off my own biases, but I think that if you replace your water, dark, and normal types with other Pokemon, you'd be fine. Perhaps look into Cacturne or Flygon to compliment your types.

 

[Insanity Mawile]

Azumarill owns with Huge Power. EV train if you want, and give it Subpunch/Frustration/Ghost move. Or replace with Starmie.

Kecleon goes, replace it with Flygon.

 

[C Sherbii S]

Kecleon is off my team now, but were do I get a flygon at?

 

[Insanity Mawile]

Get a Trapinch in the desert and TRAIN to Lv. 45.