What does valid mean in PE?

Can you get Eggman Nega's costume in Mario and Sonic at the Olympic Winter Games? Are video game emulators legal? Do Zelda and link kiss? How many songs are in SSBB? How do you open the warp at eldin bridge? When a printer isn't working correctly what are two ways the problem is communicated to the user? How long is a firefight set halo reach? Can you play Sins of a Solar Empire Rebellion LAN with only one disk? How do you put codex pages up on the wall in assassin's creed 2? What are the evolved forms of poliwhirl on Pokemon Gold? How do you get instruments for sims 2? What is are nuts and bolts made out of? What are some games like imvu but no installing or downloading? What is the order of the splinter cell series? What can you build with a terran starport? Can you skip levels on Halo 3? How do you get to krokotopia in wizard 101 with out membership and crowns? Does a fantasy story have to have action in it? What is the easiest seed to survive in minecraft pe? What tricks does puck play on humans?