First you need to get all eight badges (I reccomend you save Clair for last). After you exit the last Gym (or Dragon's Den if you fought Clair last), Prof. Elm will call you and say, "(your name), I have something for you. Could you swing by my Lab?" FLY to New Bark Town and enter the Lab, then talk to Prof. Elm. He will then give you the Master Ball! Now, go to Cherrygrove City and perform the Item Duplicating Cheat (as seen farther up this page (NEVER USE LEGENDARYS OR YOUR GAME WILL ERASE ITSELF!)several times-for now, you will need about 10 of them (see my Fast Duplicating Cheat farther down this page for a faster method). ALWAYS save at least one ball to duplicate when you used most of them! Now check your POKeDEX for the current locations of Entei, Suicune, and Raiku. Go to those locations fast but be careful about FLYing! They're always at Lv.40-you can also try one of Kurt's Fast Balls, but a Master Ball is most recommended.After you have obtained them, go to Whirland Islands (Silver Version-Lv.40, Lv.70 in Gold) and keep going until you find Lugia (you need the Silver Feather for this to work)... you're on fire if you're falling down a waterfall (I haven't quite found the way yet)!... At least, you're doing better that me.Catch it on your first try with a Master Ball! Now let's go get Ho-oh! (you need the Rainbow Wing first) Go to Violet City and enter the Tin Tower, then give that guy the feather. Ho-oh should then appear (Lv.40 in Gold, Lv.70 in Silver)-in Gold, you get the Rainbow Wing from the Director in Goldenrod, and in Silver, you go to Lavender Town and visit their Radio Tower. You should now have at least 5 Master Balls left. Now it's time for Celebi! People often say that you can only get Celebi in the US versions through a Nintendo Event, but there is another way (No, NOT BY GAMESHARK!)First you must catch all 26 Unowns in ABC order. Then arrange some in your party to spell CELBI. Put Ho-oh last in your party, and in this EXACT order or the cheat won't work.(you also need all of the legendarys without a Gameshark, including Mew) Then go to the Ilex Shrine in Ilex Forest (DUHHH) and use FLASH (trust me, it WILL work). Celebi will pop out at Lv.5, so if you want, you can also try a Level Ball. Have fun with your new POKeMON! LORD OF MEW:)