It's always easy to use escape rope, or DIG, or TELEPORT.
Catch Moltres
mt. moon
in mt moon and the safari zone
diamond, pearl, platinum= underground ruby and sapphire= in the desert emerald= the tower in the desert red, blue, yellow, firered, leafgreen= in mount moon.
Spoons! Buy some spoons and get digging!
Use a moon stone on it.
Clefairy, Jigglypuff. Umbreon. etc.
there is no mt moon in that game. You must be thinking of Pokemon firered or leafgreen unless you mean mt coronet.
Clefary is in mount moon, and jigglypuff is right outside. If you're patient, check out the safari zone, but you could also get some as prises at the rocket casino.(Scyther, dratini, porygon, ect.)
Clefairy, Jigglypuff, Nidorina, Nidorino
Yes, you can, it is a legendary Pokemon which you can obtain in the powerplant. It will appear at level 50 and you cannot breed it; not even with a ditto. the powerplant is out the front of mount moon except go down the river and you will found powerplant were Zapdos is