Mario and Luigi were on a ship approaching Yoshi's Island. They looked down off the side of the ship at the waves splashing around. They occasionaly saw a Dolphin poke its head up from out of the water. Something then occured to Luigi.
"Mario, I am not so sure about this. This could be one of Bowser's traps. Shouldn't we have defeated him again?"
"I don't know. He always seems to return after getting burned, after falling down a so-called bottomless pit, or whatever. Besides, he may not have been lying. And if this was a trap, I don't think we would have found that ruby," Mario replied.
"How convenient for it to appear like that..."
"Yeah."
"Mario, do you think it was such a good idea to leave it in our house? We don't have security," Luigi asked.
"Nah. Who-a else would be looking for them?" Mario said.
"Guess you're right."
The ship made it to Yoshi's Island, and Mario and Luigi were greeted by their old friend, Yoshi.
"Mario! Luigi! Yoshi glad to see you!" said Yoshi excitedly.
"Good to see you, too, Yoshi!" said Mario.
"Hey, Yoshi. Have you seen a sparkling gemstone anywhere?" asked Luigi.
"Huh?"
Mario showed him the paper with the pictures of the gemstones and told them all about what had happened.
"I saw an emerald like that about a month or two ago," Yoshi said, pointing to the sparkling emerald on the paper.
"Where?" Mario asked.
"In a cave on the Yellow Switch Palace Mountain! Come on, I'll show you," he said.
The plumbers followed the dinosaur.