Smaug was a dragon.
Smaug only appeared in the Hobbit, where he was killed and he never appeared again (because he was dead). So smaug was not in the Lord of the Rings trilogy, but he was in the Hobbit.
The mountain where the dwarves use to live before smaug came and claimed the mountain and its gold.
Dale was destroyed by Smaug. It was one reason Bard thought he and his men had a right to some of the dragon's treasure. It was rebuilt after Smaug was killed.
Smaug
Smaug was a dragon.
Smaug the dragon was voiced by Benedict Cumberbatch.
Smaug only appeared in the Hobbit, where he was killed and he never appeared again (because he was dead). So smaug was not in the Lord of the Rings trilogy, but he was in the Hobbit.
The mountain where the dwarves use to live before smaug came and claimed the mountain and its gold.
a red glowing dragon that has thousands of gold piles
Bilbo told Smaug a riddle to keep him distracted.
The main conflict in The Hobbit is trying to regain the Lonely Mountain from Smaug the Dragon.
The dragon Smaug stole it.
Thorin Oakenshield lived in The Lonely Mountain, but he and the other dwarves have lived in exile since the dragon, Smaug, took the Lonely Mountain.
The Hobbit by JRR Tolkien.
The name of the dragon was Smaug. He was a winged fire drake, and he drove Thrain and Thror from the Lonely Mountain. In Appendix A of The Lord of the Rings he is given the title of Smaug the Golden in the story of how he took over the area around the Lonely Mountain.
Thorin Oakenshield lived in The Lonely Mountain, but he and the other dwarves have lived in exile since the dragon, Smaug, took the Lonely Mountain.