In a universe parallel to that of Yoyo Yoshi's, a baby Yoshi was born. He was named Kool Yoshi. In the beginning, he was like most other baby Yoshis, but soon it was discovered that this Yoshi was a prodigy! By the age of one, he had learned to walk. When he turned two, he was fluent in Yoshi, Pokémon, and English! At the age of three, Kool Yoshi was learning subtraction, while all the other Yoshis in his universe were only learning addition! As a four-year-old, Kool Yoshi had completed all of his education. Not much after he turned five he had already learned to fight and started learning military strategy. Kool Yoshi became a leader to the Yoshis and also a threat to their worst enemy, Bowsa.
You see, unlike in Yoyo Yoshi's universe the Bowsa in Kool Yoshi's universe had already taken over the Mushroom World, Dinosaur Land, and Y'oster's Isle. He imprisoned the former leaders and made the Mushrooms and Yoshis his slaves. While all of his slaves wore rags, Bowsa dressed like a king. While his slaves ate stale bread, Bowsa ate like a king. While his slaves slept on the cold, hard floor, Bowsa slept on a soft and comfortable king size bed, like a king. In fact, Bowsa made all of his slaves bow down to him and refer to him as "King Bowsa, The Exalted One"!