I'm currently playing a fan game called Pokemon Reborn. It's on the edgy side, but not like shock value for the sake of shock value, and besides, it's really well made.
The game has a few gimmicks:
1. Pokemon above certain level won't listen without badges regardless of whether they were traded or not. Levels can be reduced using Common Candy that can be bought cheaply in the candy store.
2. Terrain effects. Many places have special effects that affect pokemon and their moves. Mountain terrain amplifies flying moves, while caverns reduce damage from wind-based moves greatly. Some effects can be changed in specific ways; for example forest terrain becomes burning terrain if a pokemon uses a strong fire move.
I'm not nuzlocking, but I still only catch the first pokemon in each area for the thrill of it. I'm at the first leader right now.
The leader uses poison types in a double battle at max level 45. She leads with Toxpex that hits hard with sludge wave, and Nidoqueen that sets up sneaky pebbles. The issue is that the terrain effect causes stealth rock to hit every turn.
My team consists of Charizard, Luxray, Dugtrio, Seaking, Bronzong, and Klinklank. I've tried many times with many different strategies, but I couldn't win. There is ine more way to increase my chances - EV training.
Charizard genocided Unowns to increase both attack stats, Seaking fought Duskulls to increase special defense, Luxray got speed and attack from Voltorbs, Togedemaru and Meowths. The others are waiting for their turn. Dugtrio will probably be trained in attack, Bronzong in defenses (with its meager sp attack, the only way to make it useful is hypnosis), and I don't know about Klinklank.
The majority of those pokemon were unboxed for this battle, and leveled with exp candy. EV training should make a huge difference. Too bad their IVs range from bad to atrocious.
I'll start with Seaking and Luxray. My Seaking, I believe, outspeeds Nidoqueen, so it will hit with horn drill to prevent setting sneaky pebbles. Luxray is supposed to remove Toxapex. After that I have no idea what will happen. I'm worried about the leader's Drapion. Dugtrio can hit it fast and hard, but it's the only pokemon on my team that can hit with a super effective move.
Whatever happens, I will persevere.