Joker is about said Phantom thief who travels the globe in search for treasure to steal, but he always sends an advanced notice so it's fair challenge between him and the current owner of the treasure.(it's still stealing though). What I like about joker is that this is an episodic anime, anime usually has story progression in every episode unless it's has filler or is poorly written but this series is like an action cartoon like Miraculous Ladybug or Danny Phantom where there are stand alone adventures but They also have episodes with story progression. It's a nice change of pace considering it's anime. Ialso like the fact that it takes place all around the world And they use that to there advantage like an episode in Greece has Medusa guarding the treasure, in France they fight a painter who can bring paintings to life and in the middle of the ocean they engaged pirates. Not every treasure has be based on a specific place to stand out like the golden Egg or the ones from there flash back episodes. The show's color-scheme matches it tones great with flashy colors too. Any flaws I have is that Joker can kind of be a dick sometimes but it never that bad and some jokes don't always hit. Still I recommend it a lot.