"My grandson* or is it my son? only wishes he was THIS classy."
Night Hood (aka Les exploits d'Arsène Lupin) was a French-Canadian animated series inspired by the Arsène Lupin novels by Maurice Leblanc. Set in the 1930s, Lupin is aided by his assistant Grognard. Getting involved in his exploits are two reporters, Kelly Kincaid and Max Leblanc. Inspector Ganimard and Sgt. Folenfant seek to capture him. Lupin himself opposes the schemes of billionaire arms industrialist H.R. Karst, the devious May Hem and a tough as nails thug known only as Steel.
Calling Card: Lupin's left these so many times, Karst just has to leave a fake card at a crime he planned, and Ganimard and Folenfant are on Lupin's trail - or so they think... Several times Lupin complains that his habit of leaving a calling card just makes him easy to frame.
Concealing Canvas: In one episode, Lupin and Grognard are baffled as to where some hidden documents could be in the room, because there are no paintings for a safe to be hidden behind, and as Grognard points out, "All safes are behind paintings!". Turns out it was behind a tribal mask.
In one episode, he allows himself to be caught, but he doesn't have his monocle on. It turns out to be Grognard wearing a Lupin mask.
There's also this one episode when Lupin reveals himself to May Hem by removing his mask and putting on his monocle. Then, May Hem slaps him and his monocle falls out.
Hopeless Suitor: Folefant is this to Kelly. There's an interesting variation to this in that Kelly knows he has a crush on her, and is more than willing to exploit this by taking him out to lunch for a scoop... but nothing more.
Ink-Suit Actor: The opening features a moving silhouette of Lupin played by a live actor, with scenes from the show playing on the silhouette.
Schizo Tech: The show is set post World War I and yet, there's the existence of surveillance cameras and automatic doors.
Shout Out: This version of Lupin has several Shout Outs to various anime series, least obvious is Lupin himself takes several visual and stylistic cues from Tuxedo Mask and there are even a few to Lupin III (the dynamic between Lupin and Ascended Extra Grognard owes a lot to that between Lupin and Jigen).