I think the defensive sets need a change of ev's slightly, because they suggest 48 speed ev's, which to me seems completely pointless. The page currently says:
"48 Speed EVs are used to hit 220 Speed, which outspeeds Modest Empoleon after an Agility and allows Rotom-A to either burn it with Will-O-Wisp or hit it with Thunderbolt."
Now I'm assuming that "after an agility" is a typo, but even so Empoleon (and any agility user that can't reach 247) always uses a speed stat of 209. Not to mention the rise of CM Suicune basically killed off Agility Empoleon anyway. Empoleon was 42nd on the useage list last month, with a percentage of 3.89%, it might as well be UU.
But due to the rarity of 209 agility pokemon in the current metagame anyway, probably due to scarf Flygons prominence, I recommend the following ev spread:
252 hp / 252 defence / 4 sp.def
A basic max defence ev spread to help against Pursuit users, U-turners and threats such as Gyarados, Breloom and Metagross. If you really want some speed ev's then use 252 hp / 248 def / 8 speed, giving Rotom a speed stat of 210 beating the old 209 agility users.
Screech Flygon is terrible, mainly because screech is a terrible move that doesn't even get 100% accuracy. Consider the fact that Mix Flygon and Choice Band Flygon can achieve the same wall breaking results without the need for a set up move (if you can call screech that?). Then there is the fact that even if Flygon predicts the switch correctly and screeches the switch in, it then has to predict again if the opponent will stay in. This heavy prediction reliance means it's not actually any good at forcing switches, the main aim of the set. It also makes it very unreliable. It's also almost entirely reliant on entry hazards being up, otherwise the opponent can just keep switching, racking up life orb damage and Flygon's damage output is pitiful without him landing a screech first.
The damage calculations shower Flygon in too much false glory when you consider that you can't have Screech / Earthquake / U- turn / Dragon Claw and Stone Edge and even after a screech Flygon is unable to OHKO a lot of pokemon anyway. Then also consider that Screech is not a stat boosting move, Flygon cannot abuse it to sweep, only to cripple one pokemon (and only then if your prediction is right and the opponent stays in). This Flygon set also offers extremely little defensively to a team.
The useage Stats for Flygon (from last month) show the sets in the following order:
- Physical Choice Scarf
- Mix Flygon
- Mix Choice Scarf
- Choice Band
- Physical Life orb
- Toxic Stall
- Choice Specs
No screech set on there at all and if you check the Global move useage, screech is only used on 1.05% of Flygons (it's more common for Breloom to use leftovers 2.19%). I really think the screech set needs removing from the site. The inclusion of Physical Life orb is also questionable when the you consider how much better the Mix Life orb and Choice Band sets are. But anyway, Screech Flygon should be remove because it's not a very effective set, it's not commonly used and it's unreliable due to it's heavy reliance on prediction.