???
I don't see any comedy in any of the Patlabor movies, these were designed from the get-go for an adult audience (get your mind outta the gutter) as you can tell from the political subject matter and level of sophistication in its character treatments, unlike the TV series and the "new OVA" it spawned, which relies more on comedy for its target audience (kids & teens).
I'd recommend the Read or Die movie. No prior knowledge of the manga or TV series is required, a good standalone 2 hour movie with plenty of action and fun.