Going to and from Ned
When you reach the final save before the last boss, save your game. Then, leave Feenal (or whatever it's called) and head for Fun City. When you get there, go to the Battle Arena. Talk to the old guy in the back of the colluseum. Answer 'yes' to all of his questions and you'll be transported back to Arlia. Feel free to explore Expel as long as you want. When you complete the Trial Cavern (or are done exploring), head back to Arlia. Next to the Item shop there's a small pen with what looks like a penguin walking around in it. Talk to it and it will say something unintelligible. You then have two options. They're something like 1) I don't understand. 2) Stupid something. If you pick the second option, the 'penguin' will send you back to Ned. If you want to return, just talk to the old guy again. Good luck!