There are better Light Screen users out there than Reuniclus. These Pokemon are Klefki, which has Prankster to give the screens +1 priority, and
[email protected], which have more options to support the team further. Take note that dual screens are more suited towards offensive teams:
Klefki:
-Reflect
-Light Screen
-Fairy Lock
-Foul Play
Nature: Calm
EVs: 248 HP/8 Def/252 SDef
Item: Light Clay
Ability: Prankster
Latias:
-Reflect
-Light Screen
-Healing Wish
-Dragon Pulse
Nature: Timid
EVs: 252 HP/4 Def/252 SDef
Item: Light Clay
Latios:
-Reflect
-Light Screen
-Memento
-Draco Meteor/Dragon Pulse
Nature: Timid
EVs: 252 HP/4 Def/252 Spe
Item: Light Clay
There's no need for Ferrothorn to have both Toxic and Leech Seed at once. Supporting the team with either Stealth Rock or Spikes is one of its staple perks:
-Spikes/Stealth Rock
-Leech Seed
-Power Whip/Protect
-Gyro Ball/Thunder Wave
Nature: Relaxed
EVs: 252 HP/88 Def/168 SDef
Item: Leftovers
Ability: Iron Barbs
Jolteon is outclassed by other Electric Pokemon like Raikou because even though Raikou is slower, it doesn't roll over and die to virtually any hit. It can also make use of Assault Vest nicely, should you need that:
-Thunderbolt
-Volt Switch
-Hidden Power (Ice/Grass)
-Shadow Ball/Extrasensory
Nature: Timid
EVs: 252 SAtk/32 SDef/224 Spe (Assault Vest) or 32 HP/252 Atk/224 Spe (Choice Specs)
Item: Assault Vest/Choice Specs
Mega Aerodactyl's common weaknesses make it extremely difficult for it to set up Hone Claws; it's better off all-out attacking:
-Stone Edge
-Aerial Ace
-Fire Fang/Earthquake
-Ice Fang/Aqua Tail
Nature: Jolly
EVs: 248 Atk/44 Def/216 Spe
Item: Aerodactylite
Given Aerodactyl's Stealth Rock weakness, you need Rapid Spin/Defog support. Over Togekiss, use Starmie or Excadrill:
Starmie:
-Scald
-Reflect Type
-Rapid Spin
-Recover
Nature: Timid
EVs: 248 HP/16 Def/244 Spe
Item: Leftovers
Ability: Natural Cure
or
-Hydro Pump
-Psyshock/Thunderbolt
-Ice Beam
-Rapid Spin
Nature: Timid
EVs: 252 SAtk/4 SDef/252 Spe
Item: Life Orb
Ability: Natural Cure/Analytic
Excadrill:
-Earthquake
-Iron Head
-Rock Slide
-Rapid Spin
Nature: Jolly/Adamant
EVs: 252 Atk/4 Def/252 Spe
Item: Choice Scarf
Ability: Mold Breaker
Gengar should just use max Special Attack/max Speed if it intends to go offensive. What's the use of Protect?:
-Shadow Ball
-Sludge Wave/Sludge Bomb
-Focus Blast
-Destiny Bond/Taunt/Substitute
Nature: Timid
EVs: 252 SAtk/4 SDef/252 Spe
Item: Life Orb/Focus Sash/Black Sludge
or
-Substitute
-Shadow Ball
-Will-o-Wisp
-Taunt/Sludge Bomb/Sludge Wave/Disable
Nature: Timid
EVs: 28 HP/148 SAtk/80 SDef/252 Spe
Item: Black Sludge
or
-Hex
-Taunt
-Will-o-Wisp
-Sludge Wave/Sludge Bomb/Substitute
Nature: Timid
EVs: 8 HP/248 SAtk/252 Spe
Item: Black Sludge