[The Chaos Entity]

Drago Knight Hunter looks to be an MMORPG to me, with all the Riders using it at once - perhaps if they all use it, it's Level 4, but if just one uses all the pieces, it's Level 5?

The way I've been thinking of them is...

Mighty Action X - Action Platformer
Taddle Quest - Eastern RPG
Bang Bang Shooting - First-Person Shooter
Bakusou Bike - First-Person Racer
Gekitotsu Robots - Arena-style Beat-'em-Up
DoReMiFa Beat - Rhythm Game
GiriGiri Chanbara - Historical Hack 'n Slash
Jet Combat - Tactical Shoot 'em 'Up
Shakariki Sports - Sports Simulator
Drago Knight Hunter Z (Drago Knight Hunterz?) - Fantasy MMORPG
Dangerous Zombies - Survival Horror
Knock-Out Fighter - Traditional Fighting Game
Perfect Puzzle - Puzzle Game
Mighty Brothers XX - Mechanics-Expanded Sequel (A la Mega Man X4 allowing play as Zero, or Sonic and Knuckles with Knuckles; doubling as a reference to Super Mario Brothers)