This team needs work...

I've been helped with a lot of my team. All of my Pokes have been recommended to me by different people, with the exception of Zoroark and Chandelure. I've done quite a bit of the work on my own though. On all of them, I've changed them from what people recommended in one way or another, either moves or the way I use it or...whatever. Anyway, I'm new to this and not very good, but i'm getting better. Please, I really just need help so be as harsh as you want. I'm not to attached to any of these so...yeah.
And with out further ado, my team:

Gigalith - AKA Olympus (the mountain of the gods)
EVs: Atk-252, Def-252, HP - 4 -- Nature: Impish
Item: Custap Berry -- Ability: Sturdy
Moves: Stealth Rock - Earthquake - Heavy Slam - Explosion
Description: My lead, obviously. He comes out. Lays down Stealth Rocks, eats his berry and explodes. Occasionally, if someone tries to lead with a Ninetales or Skarmory or something I Earthquake it or Stone Edge it and then Explode before it faints. Sturdy helps.

Zoroark - AKA Loki (Norse god of mischief)
EVs: Sp.Atk-252, Spe-252, Sp.Def-4 -- Nature: Modest
Item: Life Orb -- Ability: Illusion
Moves: Night Daze, Flamethrower, Extra sensory, Shadow Ball
Description: I dunno. I always put a weird one at the end so Illusion messes with people. It's Flamethrower really helps, as does its Night Daze which occasionally lowers accuracy. I'm not sure what you'd call it. Maybe a sweeper? A mind effer? I dunno.

Vaporeon - AKA Neptune (Roman god of the sea)
EVs: Sp.Atk- 252, Sp.Def- 252, Spe-4 -- Nature: Calm
Item: Leftovers -- Ability: Water Absorb
Moves: Scald, Wish, Protect, Hidden Power (ice)
Description: I use it as a basic water type and a staller (is that right? staller?), especially if scald manages to burn it.

Reuniclus - AKA Minerva (Roman goddess of intelligence)
EVs: Sp.Def - 252, Def - 252, HP- 4 -- Nature: Bold
Item: Leftovers -- Ability: Magic Guard
Moves: Recover, Calm Mind, Psychic, Focus Blast
Description: Wall. I know this one is a wall. It works. I like it. It's Shiny and blue.

Terrakion - AKA Atlas (The titan who held up the sky)
EVs: Atk - 252, Spe - 252, HP - 4 -- Nature: Jolly
Item: Choice Scarf -- Ability: Justified
Moves: Close Combat, Earthquake, Stone Edge, X-Scissor
Description: My fast as anything Choice Scarfer. Pretty simple

Chandelure - AKA Charon (boatman who took people across the river to the underworld [often pictured with a lantern in the darkness])
EVs: Sp.Atk - 252, Sp.Def - 252, Def - 4 -- Nature: Modest
Item: Leftovers -- Ability: Shadow Tag
Moves: Shadow Ball, Flamethrower, Will-O-Wisp, Calm Mind
Description: The position I just can't fill. First it was Sawsbuck, then Azelf, then Whimsicott, now this. I like it so far, but i liked the others to begin with too. Eventually they just stopped working for me. I don't know if this one will, but I like the specie so I decided to try it. Also Shadow Tag is nasty. I've run into a few shadow tagged chandelures along the way and, if used correctly, kill.

So yeah. There are my six mythological figure pokemon. (Whatever I replace or change I plan to keep the theme. What can I say, I like aesthetics.) Please leave a comment, send me a message, whatever, just let me know what you think and how I can improve. If you want to battle I'm also open to that if you'd like to see it in action. Okay, thanks so much!

-Dan

Pretty good synergy. But when Chandy dies, you get cock-blocked by Banded Scizor's U-Turn/Bug Bite. Keep that in mind. Also, once Vap dies, you lose to Surfers. Yeah.

1. Shadow Tag Chandy is illegal.
2. You might want to put Grass Knot on Zoroark for bulky waters.
3. If you want an Ice Type attack on Vappy, why not just use Ice Beam? Or you could use HP Electric.

Thats pretty much it d:

I was told shadow tag was fine because it was in the DW and therefore un-monitored/regulated. I don't care though. I'll ditch it.

Overall the team isn't really bad at all. What I notice, however, are bad EVs. Gigalith's, Zoroark's, and Terrakion's seem fine, but the rest need work.

Vaporen: A WishProtector doesn't need full Special Attack investment (not that you're going to be sweeping much with scald and HP Ice anyway). I would keep 84 EVs in Sp. Atk at MOST, then dump the rest into regular Defense and HP. You don't really need the 4 Speed EVs either, so you can dump that into another stat. Also, take Evan's advice and either get Ice Beam or HP Electric. There's no reason for HP Ice to be there.

Reun: Since you have CM, take your EVs out of Sp. Def. and invest in HP. To be honest though, I never really cared for CM Reun because it's so slow. TR Reun, however, can wipe things out easily.

Reun @ Leftovers/Life Orb
Ability: Regeneration/ Magic Guard
Nature: Modest
EVs: 252 Sp Atk/ 84 HP/ 100 Def/ 72 Sp Def
IVs: Make sure you have 0 Speed
-Trick Room
-Psyshock/Recover
-Focus Blast
-Shadow Ball

Kills a ton of stuff, especially if you use Life Orb + Magic Guard, and also becomes a status absorber. Regeneration is an option too, restoring 1/3 of your health each time you switch it out, although this team seems to be fairly speedy, so it might be the inferior option.

Trick Room is the crux of the set, and allows Reun to outspeed pretty much everything, because you reach about 50 something speed if I recall correctly. Psyshock is there for STAB and so you aren't walled by Blissey/Chansey, although you can go for Recover for some extra, er....recovery. Focus Blast kills T-Tars thinking they can wall you. Shadow Ball is there for extra coverage, and if I recall correctly, grants you perfect neutral coverage along with Focus Blast. Overall it's a killing machine.

Chandelure: Get your special defense investment the hell out and put them into speed. Lose Shadow Tag because it's banned (PBC keeps it because that server allows just about anything and is filled with Drizzle + SS faggotry), and get Flash Fire instead. Also, since you have Calm Mind, change your nature to Timid for more speed.

That's all I got. The team is pretty solid, just needed some adjustments. I also notice now that you seem to be a bit on the special attacking side, so maybe you need to consider dropping whatever your worst special attacker is and put in something that can hit physically.