Incorrect. Dragon Quest Monsters IV: Joker. It is an iteration of one of Dragon Quests's side series, and contains familiar but unique gameplay. In many ways, it can be described as Dragon Quest VIII converted into a Dragon Quest Monsters game.
Yes, they do exist.
You can't but you can make one @ dragon quest monsters.com
Karthus
If you want a Great Dragon you can synthesise Drakularge + Jamirus or Any Class-A + Any Dragon. http://www.flamingbaby.com/gaming/tips-and-tricks/dragon-quest-monsters-joker-monster-list-and-breeding-guide.html
As far as I know, DarkKings don't appear in Dragon Quest Monsters Joker. It was only in a few Dragon Quest games.
you hit him
you can get it from certain monsters
yes
fight scout go in battle with get all the monsters
There are currently 6 DS Dragon Quest games. Dragon Quest IV - The Chapters of the Chosen Dragon Quest V - Hand of the Heavenly Bride Dragon Quest VI - Realms of Reverie (Revelation in the US) Dragon Quest IX - Sentinels of the Starry Sky Dragon Quest Monsters: Joker Dragon Quest Heroes - Rocket Slime
You can either synthesis them, get them in a trade, or get a couple as reward monsters after the game.