Yes, they do exist.
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.
You can't but you can make one @ dragon quest monsters.com
In the "Dragon Quest" series, the games that prominently feature the ability to use monsters include "Dragon Quest V: Hand of the Heavenly Bride," where players can recruit monsters to fight alongside them, and "Dragon Quest Monsters," a spin-off series dedicated to monster collecting and battling. Additionally, "Dragon Quest XI: Echoes of an Elusive Age" allows players to use certain monsters in battle through the "Monster Team" mechanic in the post-game content. The "Dragon Quest Builders" series also incorporates monsters in a more indirect way, focusing on crafting and building with their involvement.
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
You can either synthesis them, get them in a trade, or get a couple as reward monsters after the game.
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