Yoshi had just started a rockslide on the cliffs nearby whirlpool cliff at Birdo's advice. The plan was to use the rockslide to carry Yoob over the cliff in the rockslide and into the whirlpool's at the bottom. Both dinosaurs hoped that Yoob would not be able to survive if it fell into the whirlpools. Yoshi had started the rockslide by throwing a large egg at the base of an overlooking cliff opposite whirlpool cliff. After Yoshi had thrown the egg, Birdo sub-consciously grabbed Yoshi's back to comfort herself. Yoshi didn't appear to realise that she was holding onto him. The rockslide that Yoshi had started turned out to be fairly large, much bigger than how big Yoshi had estimated that it would be. As they had hoped, Yoob couldn't keep it's footing during the rockslide and fell over. It was carried over the cliff by the rockslide and fell into the whirlpools. There was a huge splash when Yoob hit the water. Yoshi and Birdo could see the splash of water come up from where Yoob had fallen into the water.
"It worked!" Birdo exclaimed. She then realised that she was holding onto Yoshi's back. She let go of Yoshi and looked away; trying to hide the face that she was blushing a little. Yoshi looked around and put a hand on her shoulder.
"Birdo, are you ok?" Yoshi asked. Birdo turned around and looked back at Yoshi. She blinked a couple of times before responding.
"I'm just… just… just relieved that the plan worked."
"But it brings up the question, what do we do now?"
"I want to get to the shroobs main base."
"Why do you want to go to the shroobs' base?"
"The way that shrooboid we faced was talking about me, there must be something about me. I want to find out what they know about me."
"I understand, but how do we get to the shroobs?"
"I don't know. We could stow away on one of the shroob saucers."
"Isn't that kind of dangerous?"
"Do we have any other ideas?"
"I see your point." Yoshi then had another thought about the situation. Their battle with the shrooboid was a difficult battle. If they were going to the shroob home world to save everybody, they would be fighting several of them at once. This was never going to be easy unless they had a way to get rid of them quickly that didn't involve eating them.
"But how are we going to defeat all of the shroob if we go there?"
"Defeat all of the shroobs?"
"I'm not eating them again. That shrooboid left a very horrible taste in my mouth."
"Yoshi, much as I hate to say this, I don't think there is any other way to defeat them."
"I remember my dad saying that they had some kind of killer weakness that wiped all of them out."
"What was it?"
Yoshi had a think for a moment. He needed to remember what his father had told him about the shroob's weakness. His memory was a little misty, mainly because of the panic of Yoob. While he was thinking, he was looking around in the sky. He couldn't see anything of interest for a while, that was until he saw an object getting closer. As it got closer, he realised that it was a helicopter and not a shroob saucer. Birdo realised that Yoshi was looking up at something and looked up as well. She then noticed the helicopter descending as well. It was looking as though it was going to land on top of them, so they both moved away from the spot, still looking up at the helicopter. As it got closer, they could see the design of the helicopter. It was mostly white and there was a large logo on the side. It was a logo that Yoshi recognised immediately. It was Professor E-gadd's logo. Birdo didn't recognise the logo and got slightly nervous. She sub-consciously grabbed Yoshi's hand. Yoshi noticed and looked at her. Birdo blushed, let go of his hand and looked away. Yoshi couldn't understand what Birdo was thinking, but decided in his head to find out later. He turned his attention back to the landing helicopter. It landed a few feet away from the two dinosaurs. There were a couple of minutes before the door on the side opened. Birdo had taken the courage to look back at the helicopter that had just landed. Out of the open door stepped Professor E.gadd. He was wearing a necklace, which had some sort of box attached. As soon as he stepped out, E.gadd looked at Yoshi and Birdo with a smile on his face.
"I'm glad you two are ok." The professor said. Yoshi and Birdo remained quiet. This was mostly because they thought that E.gadd would not be able to understand what they were saying, and partly because they were slightly nervous about whether any more shroobs would show up at any moment. There was a long stare down while Yoshi and Birdo collaborated their thoughts. Eventually though, Yoshi decided to ask a question he wanted to know.
"Professor, I need to know. Is Mario ok?" E.gadd looked to the floor for a moment. Yoshi began to worry. At first he wasn't sure whether E.gadd understood what he said. Eventually though, much to Yoshi and Birdo's surprise, E.gadd answered Yoshi's question, like he had understood what he had said.
"Yoshi, I'm afraid that he has been taken by the shroobs, along with everybody else who was at the castle." It obviously didn't click that E.gadd could understand what Yoshi had said. Yoshi's head sank; he collapsed onto the floor and began crying. Birdo knelt beside him and put her hand on his shoulder in a vain attempt to cheer him up. Yoshi just kept on weeping. Birdo actually knew this but hadn't told Yoshi because she didn't want to upset him. Plus the whole Yoob fiasco had forced it to the back of her mind. But Birdo had noticed that E.gadd had understood what Yoshi had asked.
"Professor, can you understand us?" Birdo asked. E.gadd just pointed to the box that was attached to the necklace he was wearing.
"My newest invention, the Gadd Translator. A universal translator. I'm hoping to try it out against the shroobs, but know I know it works with you guys." E.gadd replied. This triggered another memory, one that she hadn't forgotten. She decided to ask about it immediately.
"On that note professor, I can understand what the shroobs are saying." E.gadd just stared back at Birdo for a moment. What Birdo had just said had shocked him. He couldn't think of what to say. There was no logical explanation that came to his mind that would explain why Birdo could understand the shroob's language. However, he did have a thought.
"Birdo, did the shroobs say anything to you directly?"
"They did actually. Something about my mission being complete and it was time for me to return home." E.gadd's mind had begun thinking quickly. He then had a possible thought to explain what might be going on, but he knew that Birdo wouldn't like the explanation. He thought he'd ask her first.
"Birdo, I have an idea, but you're not going to like it. Do you want to her it?" Birdo looked at E.gadd again. The words 'not going to like it' had gotten her attention. This told her that it would be a bad explanation that she would like. She was suddenly very quiet. She still had a hand on Yoshi's shoulder, who had stopped sobbing and was just sitting in sorrow. Birdo still didn't know whether she wanted to listen to E.gadd's explanation or not.
"Do you have any other theories other than the one I won't like?" Birdo asked. E.gadd looked at Birdo and shook his head.
"No, I don't have any other ideas. Do you want to hear my main one?" Birdo had another think. She didn't know what to say. One half said that she wanted to hear it but the other half said she didn't want to hear it. If she wouldn't like it, she didn't want to hear it. On the other hand, she did want any explanation for why she could understand the shroobs but Yoshi couldn't. She finally decided what to do.
"Tell me." Birdo said. E.gadd took a deep sigh and looked at Birdo. Truth be told, he was dreading telling Birdo of his theory. He knew that Birdo wasn't going to like it, but there were no other explanations.
"Soon after the first shroob incident, a small meteor hit the planet, very near this very island. The planet wasn't affected, but it was shortly after the impact that your species began to appear. There have been suggestions that the impact caused a genetic mutation that gave rise to your race."
"But what does this have to do with me understanding the shroobs?"
"Some strange pieces of DNA were found in some of the meteorite fragments that survived the impact. They weren't able to identify the DNA, but I've just begun to wonder if your species is a mutated form of shroob." Birdo looked horrified. She couldn't believe what she had just heard. E.gadd was right; she didn't like his theory.
"I could be a shroob?"
"I really don't…" Birdo cut E.gadd off before he could finish his sentence.
"I won't believe that. I can't believe that!"
"I don't believe it either." Yoshi said. He had now fully gotten over the shock of knowing that Mario had been kidnapped by the shroobs, but now he was shocked at E.gadd's explanation for why Birdo can understand the shroobs.
"We can discuss things later. For now, we should go back to my lab." E.gadd said. Yoshi and Birdo said nothing but just nodded. They followed E.gadd into his helicopter and they went back to E.gadd's laboratory.
Meanwhile, far away, on the shroob's home world, there was a huge palace, looking very similar to what Princess Peach's castle looked like when the shroobs occupied it. One of the rooms inside was a huge throne room. The room was decorated completely purple. There were also purple curtains on the walls and a purple carpet on the floor. The curtains had a shroob mushroom pattern. Also in the room were two purple thrones. There were two very large shroobs sitting on the thrones. One was taller and wore a purple robe. The shroob was also holding a golden staff in its hand. The other was slightly shorter, but wore similar attire. They both had a golden crown on their heads. The two were the king and queen of the shroob race. They were sitting on the thrones quite proudly when a single shrooboid came walking towards them.
"How goes the invasion?" The queen asked.
"All is going well. The people who foiled us last time have been captured." The shrooboid replied.
"Have you rendezvoused with our agent?"
"We tried, but the leader of them has clearly lost her memory. The moment we tried to talk to her, she attacked us and defeated the shrooboid we had sent."
"You mean she has betrayed us?" The king asked.
"We fear so. She has been seen with a native Yoshi. She even assisted the Yoshi in defeating Yoob."
"What do you suggest?" The queen shroob asked.
"The Yoshi must have done something to her. Bring her back alive and we can undo what has been done." The king instructed.
"As you wish, your majesties." The shrooboid replied.
"How long until we can shroobify our prisoners?"
"That is where our difficulty is. A failsafe requires the blood of our agent before we can turn them into shroob fighters."
"Very well. Capturing her is our first priority. Find our agent and bring her back here. Then we can turn our enemies into our allies."
"Yes, your highnesses." The shrooboid left the throne room and left the king and queen in the room.
"Why is our agent betraying us?" The queen asked.
"When we apprehend her, we shall find out." The king replied.
"But when we have her, we shall be able to get rid of the people who killed our daughters."
"Then nothing can stand in our way of dominating the mushroom kingdom."