in goldonrod theres a house on the right side by the bike shop and the lady inside will tell you if your Pokemon like u also the people in the house will give you a few tips
you talk to your Pokemon if they are first in your party and you can see by their expression weather they are happy with you or not. hope this helped :)
You have to trade with Pokemon heartgold or soulsilver. HAPPY TRADING!
To a certain degree, by talking to it, but if you want to know a specific level of happiness, you can talk to a girl who lives in a house next to the bike shop I think. If you have that Pokemon you are wandering about first in your party, she will tell you how happy it is.
I don't know all of the Pokemon that can learn Headbutt, but I know that Cubone can learn it.
i dont bloody know
Give it rare candies, walk with it. Talk to it. Use of it makes it friendlier.
There is no best Pokemon on Pokemon HeartGold.
there is no Pokemon Mansion in Heartgold.
Yes, you can. I know because I did it yesterday with soul silver.
Just ask him! How else is he supposed to know?
I don't know what you mean.
I know but how do u use it? :) Cambri