Pokemon Elite Redux

Pokemon Elite Redux is a hard difficulty Pokemon Emerald ROM hack that focuses heavily on battle strategy rather than story or catching, introducing features like over 100 new Mega Evolutions, each Pokemon having four abilities, and customization options like instant EV/IV changes. It provides multiple difficulty modes to cater to players of varying skill levels. 

Features: 

Up to 4 Abilities At The Same Time: Every Pokémon can have up to 3 switchable abilities along with up to 3 fixed ones (innates). This creates fun new strategies and endless replayability, as you can play many Pokémon in several ways. Imagine Gyarados with Moxie & Aerilate or Intimidate at the same time!

Every Single Trainer Has A Full Custom Moveset: Every Trainer party has been reworked manually, considering all new/changed abilities & moves. Most trainers have full competitive movesets with varying held items. Every rematch has been crafted individually for variety. You won't meet the same brain-dead Poochyena with Tackle everywhere ;-)

Unique Difficulty: Most strategies the AI uses, you can too. Be creative! Battle Style is always "Set". When choosing the Elite Difficulty, there is a good chance you will get slapped by the first Trainer if you're not prepared.

200+ New Custom Abilities: Featuring a total of over 370 abilities with around 50 changed/extended abilities, you will have lots of options to defeat the many challenges awaiting you. Also, all ability descriptions have been rewritten for more accuracy!

Zero Grinding

- You can set EVs quick & easy on the Summary Screen.

- Furthermore, you can change natures and abilities via Summary Screen.

- You'll get a new Candy Box (unlimited rare candies) so you can switch teams often to try out new strategies. Rare Candies have Gen 8 mechanics, which means you can evolve at the Level Cap. You can either level up to 4 levels at a time or jump directly to the current Level Cap to save time!

- Every Pokémon has 31 IVs by default. You can easily change Hidden Power types with the Type Gems.

- You can set your Speed IVs to 0 (for Trick Room teams) or back to 31 with the new Iron Pill item.

- All Poké Balls have a 100% catch rate. You can use any ball you like. Additionally, every ball is infinite use.

- All held items stay on your Pokémon after battling - no more re-equipping Berries & Focus Sashes!

- Auto-Heal before every battle - no need for medicines or other healing items anymore.

Teach Moves Directly From The Party Menu: Now you can teach all available Level-Up moves, Egg moves, TMs/HMs and Tutor moves conveniently.

Portable PC: Just like in newer Pokémon games, there is no need to go back to the Pokémon Center just to change your party. Also, you can now edit all your Pokémon directly in the PC!

Access To Many Battle & Evolution Items From The Start: You're not limited by any means - it's totally fine to send your 252/252 Atk/Speed Pokémon with Choice Band and Adamant nature against the first trainer. You'll also get all Mega Stones before battling Norman (5th Gym).

Lots Of Useful Items From Nurse Joy: Every time you talk to her in any Pokémon Center, she fills up your bag again:

- Candy Box - level up (up to 4 levels with one click or directly to the current Level Cap), without grinding

- Upgraded DexNav - instantly see all Pokémon in an area without battling them first

- All relevant Battle Items (Leftovers, Choice Band/Scarf/Specs, Life Orb, Type Gems and much more)

- All TMs and HMs + TM Case (but you need to progress the story like usual to unlock Surf etc. in the overworld)

- One of each Pokéball - they don't get used anymore when you throw them

- All useful Berries (Sitrus, Salac, Figy etc.)

- Iron Pill - to set your Speed IVs to 0 or back to 31, useful for Trick Room

- Honey for some wild encounters

- Escape Rope to save time

Many, many others