A cyndaquil is a good choice, it can beat all of gym especially if its powerful, or once it evolved naturally (not with fire stones).
start smashing rocks where the ruins r
totodile
There are no mobile phones in Pokemon Heartgold. There is a pokegear, which you get at the start of your journey. Hope this helps.
the elite 4
methsmoka
Depends...What do you think?
The Johto starters, Tododile the Water Pokemon, Chikorita the Grass Pokemon, and Cyndaquil the Fire Pokemon
start again and get cyndaquil
There is no best Pokemon on Pokemon HeartGold.
there is no Pokemon Mansion in Heartgold.
All you have to do is train your Pokemon or have a Pokemon with a good ice move
Steelix is a good Steel type Pokemon. It is also a Ground type, too.