Can also vouch for pokemmo, it's like Pokémon but better. Global trade market, large playerbase, slightly more difficult than traditional Pokémon games, travel between kanto, johto, hoenn and unova as the same character (fire red/leaf green, heartgold/soulsilver, emerald, black/white)

It truly is the Pokémon game Nintendo will never make and I'll never go back to playing the normal games, it's that good.