Overview

Elite Redux reintroduces Fog as its its own unique weather, Eerie fog, and induces these additional effects:

Drains every positive stat boost(s) of non-Ghost/Psychic-Type Pokémon by 1 stage at the end of each turn.
Halves the effect weather based recovery (eg. Synthesis, Moonlight, Morning Sun)
20% damage reduction to Ghost-Type Pokémon
Revival Blessing fails
Harvest fails
Makes all instances of curse turn into Ghost-Type Curse
The move Weather Ball changes to ghost type and doubles in Power.
Castform (Foggy) form
Other changes listed below

Move	Power	Type	Cat.	Effect
Ominous Wind	60	Ghost	Special	10% chance to raise all user's stats. Deals double damage in fog.
Curse	--	Ghost	Status	Inflicts a curse when used in fog or by Ghosts. For others boosts stats.
Trick-Or-Treat	--	Ghost	Status	The user adds the Ghost-Type to its foe and makes it weakened by fog.
Eerie Spell	110	Ghost	Status	Foe's last move has 6 PP cut. Never misses in fog.
Eerie Fog	--	Ghost	Status	An eerie fog lasting eight turns drains boosts from non-Ghost and Psychic Pokémon.
Spectral Flame	--	Ghost	Physical	Burns the target, including Fire-Types. Suppresses abilities in fog.
Vexing Void	110	Dark	Special	30% chance to lower Special Defense. Never misses in fog.
Weather Ball	50	Normal	Special	Varies in power and type depending on the weather. Weather-based.

Abilities Associated with Fog

Ability	Effect
Low Visibility	Activates Eerie Fog on entry for 8 to 12 turns.
Disguise	Protects once against an attack. Restores protection in fog.
Ectoplasm	Ups highest attacking stat by 1.5x in fog.
Surprise!	Astonishes enemy priority users in fog.
Greater Spirit	Ups highest stat by +1 on entry in fog.
Ethereal Rush	This Pokémon's Speed gets a 1.5x boost in fog.
Shallow Grave	Revives at 25% HP once after fainting in fog.
Rest in Peace	Heals 1/8 of max HP every turn in fog.
Smokey Maneuvers	Evasion is boosted by 1.25x in fog.

Item	Effect
Smoke Ball	Increases the duration of fog from 8 to 12 turns.