Another possibility is that it's the title of a video game. In a game, the 'lucky dragon' could be a playable character or a key element in the game's lore. The 'never ending story' would suggest that the game has a large amount of content, with continuous updates and new storylines. It could also imply that the game has a high replayability factor, as the story never really ends for the player.
It could also be the title of an animated series. Animated shows often feature dragons, and a 'lucky dragon' would be an appealing concept for kids and adults alike. The 'never ending story' would mean that the series could have a long - running plot with many episodes and arcs. It could keep going and exploring new adventures for the 'lucky dragon' character.