Tuxguin, the question asks how to move the snorlax in heartgold not firered or leaf green you... -insert insulting and inappropriate language here- !!!!

Yes he is although he is roaming around the joto region. If you find him, use mean look or something the first chance you get because entei is a coward. He flees in his first turn. 

You can find zapdos outside the power plant right after you beat all the sixteen gyms.

Use flash. It can be found in the 5th floor of the department store. The department store is in golden rod city. It is right across the street from the pokemon center, that really tall building. You can't miss it.

You must be patient. I once caught a mewtwo in an ultra ball. It took me around 67 great balls 36 poke balls and 93 ultra balls. But if you want to catch it faster, try paralyzing or making it fall asleep.