Both these characters bring back fond memories of late-night Cartoon Network. This was just before Adult Swim became stranger as the night went on…
Cased Closed gave me chills! This anime is about a brilliant teenage detective named Jimmy Kudo who is poisoned by a mysterious criminal organization and becomes a little kid. Under the pseudonym Conan Edogawa, he lives with his girlfriend Rachel and her father Richard Moore. Richard is also a popular (yet far-less talented) detective, but neither he nor his daughter realize Conan is Jimmy. Using Richard as a puppet, Conan solves complicated crimes – often involving murder.
The murderous scenes and serious mood of Cased Closed are contrasted by the lightheartedness of Lupin the 3rd. Arsène Lupin III is the grandson of the great Arsène Lupin, master thief and rival of Sherlock Holmes. He and his skilled friends (and the deceitful love of his life) travel the globe stealing rare items and large amounts of cash… and driving Interpol Inspector Zenigata crazy.
To see these two in a battle of wits would be amazing! While Lupin is more cunning, he tends to have terrible luck and is often duped by beautiful women. (Also, the fact that Lupin is a thief, thus, inherently the bad guy.) So I would guess Conan wins. However, this is something I’ve got to see!