dratini and palkia are the only water-dragon pokemon
YEs of course
reshiram is a dragon but he might not be the only one
You can get it in Dragons den in black thorn city.
you can get a dratini from a guy in dragons den in blackthorn city or you can catch one in the water in dragons den
No, someone else in-game gets Zekrom. You can only get it by trading with someone else.
On the water in the dragons den behind the blackthorn city gym.
Baby black dragons are 83, black dragons are 227, king black dragon is 276 and queen black dragon is 2100.
The Dragons Den is behind the Blackthorn City Gym. You just surf around in the water behind it.
Black Dragons are level 227.
The duration of Black Dragons is 1.07 hours.
Black spots will appear in water when there is a Pokemon there, the Pokemon will be less common than the others on the route
What water do you mean? There are many Pokemon related things with the word water in them