u cant but you can get mewtwo in cerulian cave at lv.70.
yes
An event
yes
you can't
Mt.Moon
Mew can't be catched in Pokemon heartgold, only mewtwo.
You catch Mew-Two
You can't catch a Mew in the wild. You'll need to trade for it or use the Action Replay.
You cannot catch a mew. You can only get it through events or cheats.
You can't catch it at Pokemon Pearl, you'll have to Transfer it from LeafGreen/FireRed or trade it with SoulSilver/HeartGold
U can't in heart gold but u can catch mewtwo
you need action replay go to youtube to get the code