in curelen cave you get mewtwo
probably missingno
Technically Cyndiquil is the strongest but it all depends on what type of Pokemon you want.
w/ out cheats it is deep in whirl islands
don
You can't find registeel in Pokemon HeartGold.
You can find it in Pokemon Platinum, Pokemon Crystal, Pokemon HeartGold, and Pokemon SoulSilver.
unkowns {pokemon}
You cannot find Latios in Pokemon HeartGold unless you went on wi-fi and got the Enigma Stone
You have to fight her. xD No, but seriously, get a whole bunch of potions and fight with your strongest Pokemon. Just keep bashing on her Pokemon XD
yes
Just find them!
You can't