Your Ferrothorn seems a little funny. A standard set looks like this:
Ferrothorn @ Leftovers / Shed Shell
Iron Barbs
252 HP / 48 Defense / 208 Special Defense
Relaxed [+Defense; -Speed]
- Spikes / Stealth Rock
- Leech Seed
- Gyro Ball / Protect / Thunder Wave
- Power Whip / Protect
As I'm sure you know, Spikes / Stealth Rock and Leech Seed work very well on Ferrothorn. Gyro Ball and Power Whip are both STAB attacks that can hit most of the metagame for neutral damage and basically the only attacks that Ferrothorn can use best short of Bulldoze. However, because of minimal investment in Attack, Protect can be an attractive option for Scouting and stalling for Leech Seed / Leftovers recovery. The final move I haven't mentioned is Thunder Wave which, despite having limited synergy with Gyro Ball, can effectively shut down many of Ferrothorn's common counters. Now, this may not be what you are going for in your Ferrothorn.. but the Natures and EVs are just a bit off. Like, a Brave nature can be used on Ferrothorn if you're using a Choice Item or something to that effect. So, let us know what your intentions are for Ferrothorn and if you're purposefully altering it.
@ Scope Lens
Brave
Thick Fat
4 Hp // 252 Atk // 252 SpD
-Rest
-Sleep Talk
-Giga Impact
-Earthquake
It looks like your combining sets here (as with Ferrothorn to some degree). A standard Rest+Sleep Talk Snorlax has some different attributes than yours, as your Snorlax seems to share characteristics with a more offensive set. Because of this, it is somewhat hard for us to determine exactly what you want to do with your Snorlax. Your EVs and attack choice lean to an offensive or Choice set, while your use of Rest and Sleep Talk focus more on survivability and longevity. That being said, I'm going to give you the ResTalk set which again, places more emphasis on Snorlax's ability to stick around in battle (although, a spread of 252 Attack / 4 Defense / 252 Special Attack has been used with RestTalk if you specifically are using Snorlax as a Special Wall. Again, this is why it's somewhat hard to rate).
Snorlax @ Leftovers
Thick Fat
208 HP / 124 Defense / 176 Special Defense
Careful [+Special Defense; -Special Attack]
- Rest
- Sleep Talk
- Body Slam
- Whirlwind
Because of Snorlax's stellar Special Defense, access to a phazing move in Whirlwind, and large HP, Snorlax does make an excellent user of ResTalk. Body Slam makes it's usefulness primarily because of the 30% Paralysis chance and a lack of necessity for EV investment in Attack. Lastly, Whirlwind is a great strategic maneuver for keeping Snorlax alive, especially if the opponent is already Paralyzed. Once again, if you want a more offensive Snorlax, let us know. I do feel obligated to mention, however, that moves like Giga Impact are rarely seen in competitive battling. Despite their power, two-turn moves like that give your opponent a chance to set up against you.
Also, if you're just looking for a bulky Pokemon, you may find better options than Snorlax out there. Again, this is a case of letting us know what you want.
@ Focus Band
Jolly
Sand Rush
4 Hp // 252 Atk // 252 Spe
-Earthquake
-Rock Slide
-Brick Break
-Shadow Claw
Your Excadrill set looks pretty good, however I should say that I don't quite understand the use of the Focus Band. Personally, I think Excadrill gets more out of an Air Balloon (or Life Orb / Choice Band), but I suppose since it's ban the rules have changed. Anyway, usually Excadrill runs Return-- for hitting Rotom-W, Gliscor, and Landorus, or X-Scissor-- for hitting Bronzong with neutral damage and destroying Dark, Psychic, and Grass types, as opposed to Brick Break or Shadow Claw. Also, give some thought to Swords Dance. Excadrill does very well with it.
@ Life Orb
Mild
Levitate
148 Atk // 252 SpA // 108 Spe
-Dragon Pulse
-Dark Pulse
-Focus Blast
-Earthquake
Hydreigon doesn't actually need EV investment in Attack, and I will explain that in a moment.
Hydreigon @ Life Orb / Expert Belt
Levitate
4 HP / 252 Special Attack / 252 Speed
Modest [+Special Attack; -Attack]
- Draco Meteor
- Dark Pulse
- Fire Blast
- Focus Blast / U-Turn
Draco Meteor and Dark Pulse are your best STAB options and Fire Blast hits Steels planning to switch in on a Draco Meteor for super effective damage. The last move slot goes to Focus Blast or U-Turn. Focus Blast rounds Hydreigon out perfectly, giving it perfect coverage and destroying Heatran (who walls Hydreigon's other moves) and Tyranitar. U-Turn however, allows Hydreigon to function very well as a Scout, gives Hydreigon a way to deal with Special Walls like Blissey before switching to a counter, and a good method of switching out in the case of reckless Draco Meteoring. So, because of what U-Turn is, Hydreigon benefits much more with having Natures and EVs enabling Special Attack more than anything.
(Shiny)
@ Choice Scarf
Modest
Flame Body
4 Hp // 252 SpA // 252 Spe
-Shadow Ball
-Energy Ball
-Flamethrower
-Psychic
You have the right idea with Chandelure, but there's a little more you can do to get the most out of this Pokemon. First, Fire Blast / Overheat are superior STAB choices to Flamethrower. Due to Chandelure's amazing Special Attack and sheer frailty, you can imagine Chandelure won't be sticking around in battle for long anyway. The principle of the matter is; hit as hard as you can and switch out. Overheat nurtures this well, but Fire Blast doesn't lower your Special Attack. Plus, because of Chandelure's immunity to Fire (given you're using Flash Fire) and Fighting, Chandelure has a
bit easier time switching in. Shadow Ball is your secondary STAB option, and equally as good. The same applies with Energy Ball, allowing Chandelure to hit the common Politoed switch-ins. Lastly, Hidden Power [Fighting] makes a better choice than Psychic for it's ability to hit Tyranitar and Hydreigon for super effective damage.
@ Choice Specs
Modest
Levitate
4 Hp // 252 SpA // 252 Spe
-Hydro Pump
-Volt Switch
-Shadow Ball
-Dark Pulse
(Shiny)
