The rage of the night in the movie How to train your dragon is toothless, this dragon needs to be added to dragon city and it must be very strong
Please

It’s already in the game, it’s the dark dragon, and it’s common rarity

Dark dragon doesn't look a lot like Toothless, except for the colour.
But they won't likely add one like him either, for copyright reasons.
The devs have already changed the looks and the names of quite a few dragons because they resemble characters from many video and media franchises.
For example, the Brown haired dragon used to have platinum hair and was called Mother dragon, looked like Daenerys from Game of thrones. They changed other GoT based dragons as well.
The Useful dragon used to be called Super plumber, and Childish used to look like Yoshi, but I don't remember his old name.
They made a LOT more changes than these example.