6th Gen Will someone help me figure out how to train my Pokemon for E4?

[Rainij]

I really need help trying to figure out weaknesses for my team and how I can one shot the E4. I have all mega evolutions for my team but input on what other items to use would be great!

Blaziken
Ability: Blaze
Moves:
- Swords Dance
- HJK
- Blaze Kick (plan on going flare blitz when he learnes it himself)
- Brave Bird (want to replace this but idk with that)

I feel very lost with Blaziken I know HJK and Flare Blitz are both very good but idk what other two moves should be

Gardevoir
Ability: Synchronize
Moves:
- Magical Leaf
- Psychic
- Calm Mind
- Dazzling Gleam

Wasn't planning on changing anything with with Gardevoir but any input would be great

Manectric
Ability: Static
Moves:
- Wild Charge
- Bite
- Quick Attack
- Discharge

Swellow
Ability: Guts
Moves:
- Fly
- Air Slash
- Steel Wing
- Quick Attack

Gyarados
Ability: Intimidate
Moves:
- Waterfall
- Ice Fang
- Crunch
- Dive

Linoone
Ability: Gluttony
Movies:
- Strength
- Rock Smash
- Cut
- Surf

Obviously my HM Slave xD

 

[Altairis]

What levels are your mons? I think that is most important when challenging the Elite Four in-game. How high of a level your mons are can make or break your challenge. What I can tell you right now is that you definitely need to replace your Linoone, or at least its moves if you want to continue using it. There's no reason to be bringing an HM slave to the Elite Four if you're already there, meaning you can fly to the Pokemon League now and don't need to use HMs.

That being said, you can replace Magical Leaf on Gardevoir for Energy Ball, which is a TM located in the Safari Zone. It's kind of a lot of work because you need to have both bikes, but it might be worth it for the extra Base Power Energy Ball has. The other movesets seem very standard, though I think I gave my Manectric Flamethrower to help with Glacia.

Oneshotting the E4 can be very easy with this team. Blaziken can run through Sidney--though maybe not Sharpedo--but you might want a more accurate Fighting-type move if you're worried. It can also help against Glacia since you don't have a Fire-type. Toughest might be Drake, but I think Gyarados will help a lot.