i pso 1&2 for gamecube i tryed the virtual missons on 2 beat it a freind but it say's i gotta redo it on single player why? also whts a good level to fight tht boss with im level 17 android

Well, as far as quests and stages are concerned. The game only saves data when you complete them by yourself, so any stages, quests or bosses beaten while in multiplayer mode won't be saved in single-player. So unfortunately you're going to have to beat it by yourself to progress further.
Now I'm not sure which boss you're speaking of but if you're still on the normal difficulty then Dark Falz(the Boss of Episode 1) should be no problem. But for the Episode 2 bosses you'll need to be around level 25, unless you have a fully leveled mag or extremely good equipment.
i think that lilsaver is talking about the VR levels spaceship and temple