>>53708919Stick to mainline games only, and amp up the difficulty by a fuckton. Make the plot be that all the regions decided to organize an International League to deal with legendary threats and crime syndicates, and everyone is fighting to become a part of it. Every named character ever is coded into the game, has unique dialogue and character arcs, and there's dating mechanics.
Give players the option to start in the region of their choice (with free travel to any other), which NPCs they want to see (custom E4, gym leaders, dating options), and which gimmicks they don't want to fight against. Otherwise, make everything random. Every named character has a fuckton of teams using different gimmicks the AI pulls out at random. Full EVs, IVs, items, and in an optional challenge mode they get friendship bullshit hax.
Fully voice acted. Smooth online mode with real-time emotes and a smogon-style team builder. New mega forms, z-moves, special Tera and g-max forms, and Charizard gets a new one of each. A fast forward button. Ash is the hidden final boss at the end of the game.