This is barely a soundtrack and more of a novelty fortune-telling disc. Monster Farm 2's Secret CD from 1999 is fourteen tracks of individual monster fortunes, each named after a creature with a luck rating attached. Mocchi gets "Great Luck" because of course the mascot gets blessed.
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Joker pulls "Terrible Luck" which tracks perfectly for the series villain. Suezo somehow also lands "Great Luck" and honestly good for that weird eyeball. The luck tiers range from Daikichi down to Daikyo, basically mapping a Japanese omikuji fortune system onto the monster roster.
Each track is short, character-specific, and more cute novelty than serious composition. It's a snapshot of how Japanese game releases used to include wild bonus content that Western audiences rarely saw. For Monster Rancher collectors who want every obscure piece of merchandise the series ever produced, no matter how strange.