The island of chaos and two different worlds

Meanwhile in Canterlot, the elements of harmony were in the library looking for possible locations of where Discord could have taken the ponies. Twilight was looking through so many books that she had a mountain on them. Rainbow dash yawned. "Find anything yet Twilight, you know what I could be doing right now.  I could be practicing for the wonder bolts." Rarity trotted up to her.  "Come on Rainbow darling we must figure this out."   Rainbow dash grabbed a book and started looking. The rest of the gang searched and searched. Twilight was getting frustrated. "There must be a book around here." Pinkie pie came bouncing over to Twilight. "Try this one." Twilight's horn glowed as she took it.  "Other worlds and there uses." Twilight looked at Pinkie when she finished reading the title. "Where did you find this?" Pinkie kept bouncing. "It was under O." Twilight wondered how Pinkie always seemed to find the book she needed. She figured  it might be her pinkie sense.  Twilight opened the book and started reading.  Rarity and Fluttershy talked while Twilight was reading. "Fluttershy don't you think we should have some outfits for this adventure." Fluttershy spoke softly like always. "I..don't know Rarity... you could if you wanted." Applejack came up  and said, "We don't need any of your fancy outfits sugercube."  Rainbow dash flew above them clearly bored since she couldn't find any Daring Doo books. "Twilight are you done yet?" Twilight turned the page and cried out happily. "Found something." The group went over to her and looked at the page. It was a picture of a island just surrounded by water. Fluttershy spoke, "What is on the island Twilight." Twilight looked at the book and said, "It says that during a time of chaos Discord  created an island where he put creatures from our world there, it seems to be that he uses it to get more chaos.  The island can change weather and the surrounding area can change. The water is not the way to go, it will lead no where and under the water is no good. It says there is a dark purple beast with scales."  Fluttershy was hiding behind a chair shaking. Applejack went over to her and put a hoof on her shoulder. "Its okay sugercube its not like we are there." Rainbow dash took the book. "We may not be but others are. We can't just leave them there." The group nodded. Pinkie pie bounced around talking about how they should bring cupcakes to the island and feed the animals. Fluttershy agreed with that. Twilight looked at the group. "Okay everypony we know where they are but we should know who they took and why. To the princess." Twilight left the library and the rest followed her and they headed to see the princess.