In the episode Rapoleon, we watch on in awe as the Hammerman tangles with a hideous French caricature who wants to shrink the world down to size.
In the episode Defeated Graffiti, Ramona gets enlisted into a fake public arts project and ends up filling Oaktown with graffiti that later springs to life and tries to, I dunno, eat the city or something.
Also, Fawn shared some graffiti photos in honor of her favorite cartoon character ever, Defacely Marmeister.
More of your viewing suggestions! Also, more Koi Kaze, for reala this time.