Hm... Let's see...
Zoroark: Why Foul Play if you're investing EVs in attack? Replace with another Dark Type move, like Sucker Punch.
Hawlucha: Replace Sky Attack. It gets one turn without charging, but after that one time, Sky Attack is basically useless. Replace this move with Acrobatics. For the item, replace Power Herb with Focus Sash, as Hawlucha doesn't have high defenses to setup Hone Claws without a Focus Sash.
Mawile: Looks okay.
Toxicroak, Ludicolo and Jolteon could benefit from rain if your team had a Rain setter. A good Rain Setter would be Pelipper, with this set:
Pelipper @ Leftovers
Ability: Drizzle
EVs: 252 HP / 120 Def / 16 SpA / 120 SpD
Modest Nature
- Scald
- Hurricane
- Defog
- U-turn
Most of your team benefits from Rain. You could replace Hawlucha, as you already have two Fighting Types.
For Toxicroak, change Ability to Dry Skin if you have Pelipper on the team.
Jolteon: Thunder instead of Thunderbolt.
Mawile: Maybe replace Thunder Punch with Play Rough for a STAB Fairy Move?
Ludicolo: Adjusted the EVs.
My revision of the team looks like this:
Zoroark @ Focus Sash
Ability: Illusion
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Sucker Punch
- U-turn
- Taunt
- Low Kick
Toxicroak @ Black Sludge
Ability: Dry Skin
EVs: 252 Atk / 252 Spe
- Brick Break
- Poison Jab
- X-Scissor
- Stone Edge
Ludicolo @ Leftovers
Ability: Rain Dish
EVs: 252 HP / 190 Def / 16 SpA / 50 SpD
Bold Nature
IVs: 0 Atk
- Protect
- Scald
- Giga Drain
- Leech Seed
Pelipper @ Leftovers
Ability: Drizzle
EVs: 252 HP / 120 Def / 16 SpA / 120 SpD
Modest Nature
- Scald
- Hurricane
- Defog
- U-turn
Mawile-Mega @ Mawilite
Ability: Huge Power
EVs: 248 HP/ 252 Atk/ 8 SpD
Adamant Nature
- Swords Dance
- Iron Head
- Play Rough
- Ice Punch
Jolteon @ Sitrus Berry
Ability: Volt Absorb
EVs: 244 HP / 132 SpA / 4 SpD / 128 Spe
Modest Nature
IVs: 0 Atk
- Volt Switch
- Thunder
- Wish
- Shadow Ball
The team revision can also be found here:
https://pokepast.es/dd1161c2d762a320
