FLCL (2000) IMDb
Tsurumaki Kazuya (director).
Lots of stuff happening around a mecha epic in a city with a giant iron.
OVA series. Surrealism for fans of animation. Japanese word games, references to the classics, hyperkinetic action, lots of meta, functional symbolism. Fine soundtrack. Get the US DVDs with Tsurumaki’s commentary: you’ll never guess who voice-acts for Miyu Miyu.