The North American "Keywords" system, and Japan & Southeast Asia "Song List" for Ultra Kaiju Monster Rancher has been solved.

What is Ultra Kaiju Monster Rancher?

• A pet raising simulation
• Breeding simulation
• Monster taming
• Fantasy
• Menu-based raising
• Real-time Combat
• Roguelike
• Single player
• Competitive

In the Playstation version of Monster Rancher, you could acquire new monsters by placing Music CDs or other games into your PSX when the game prompted you to do so.

Switch doesn't have an optical drive, obviously, so One of the primary ways to acquire a Monster/Kaiju in UKMR is to use a search for Music/Titles/Artists (in Japanese and Southeast Asia versions) or using Keywords (in North American version).

Depending on the chosen songs or keywords used, you can create a monster born with certain stats or attacks or other adjustments to their parameters.

Now that all versions of the game are solved, you can look up what you want to raise, and use the suggestions in-game to get the exact Kaiju you want! (You still have to play through much of the story to unlock some of the restricted Kaiju, however)

For those interested, the solved lists are posted here:

• North American Keywords List
• Southeast Asia Song List (English)
• Japanese region Song List (Japanese obviously)

Hundreds of hours and multiple people's efforts have been put forth to solve these lists, so we hope you enjoy!
:)