Pete Browngardt’s delightful The Day the Earth Blew Up: A Looney Tunes Movie, a love letter to Warner Bros.’s iconic Looney Tunes franchise, knows the history of its source of inspiration so well that it has the confidence to work without the safety net of Bugs Bunny. Here we get a rare modern-day spotlight for Porky Pig and Daffy Duck (both voiced by Eric Bauza) that leans into their earliest character traits: Porky as the hapless but fundamentally decent, even good-natured, average joe, and Daffy as an uncontrollable chaos god no longer bound by fate to be humiliated by his nemesis. This Daffy can do bad all by himself.

As far back as 1943’s “Porky’s Pig Feat,” Porky and Daffy have shared a chemistry premised on the tension between the former’s dignity and the latter’s penchant for anarchy. That dynamic is brought to bear here...