I noticed this among the players of Explorers of Time/Darkness/Sky: they mistakenly think that wi-fi is required to rescue someone. While that's certainly one of the perks, you can still rescue people through the good-ol' password method from Red and Blue! Here's a visual guide to figuring it out. For those of you who don't mind a summarized version, here's the menu path you take, from the starting menu: Friend Rescue -> Receive SOS Mail -> Password -> Enter Password. And now for those who prefer pictures! First, select "Friend Rescue": Since we're rescuing someone, we go to "Receive SOS Mail": We aren't doing this over wi-fi, so we need to use a password, right? The final screen is easy! Just copy the password that the victim provides. Make sure it's exactly what they typed, though! And voila! Finished! If you want to rescue them, you must select "Go Rescue" on the main menu. Simple, right? I hope this clears up any misunderstandings with rescuing others.