Sometimes DIY extends to people, and this latest twist on the Jerry Maguire archetype doesn’t give its prickly prince too far to rise to get out of his rut and assume his comic crown. Judd Apatow’s dramedy The King of Staten Island (B-) is a splendid showcase for slacker comedian Pete Davidson, who plays a 24-year-old stoner tattoo artist doing little with his life while cohabitating with his widowed mother (Marisa Tomei). The millennial protagonist’s world is upended when mom gets a new boyfriend (Bill Burr), which leads to a steady climb toward clarity and consciousness. Despite Apatow’s leisurely pace and uncertain tone, Davidson shines in the role of a character ascending to independence, with a sometimes sarcastic and occasionally soulful perspective. His wide eyes, stick figure physique and zany body art make him a perfect “rejuvenile” in search of a raison d’être. Tomei is also a delight with humor to match her obtuse offspring, but Burr is kind of a nothing-burger of a character as the newfound father figure. The function of surrogate dad as a way to stimulate the film’s man-child into a new awakening is less interesting than Davidson’s sequences bantering with pothead friends, his misanthropic exploits in odd jobs and his witty interactions with kids who are largely alien to him. There are dollops of wry jokes and fun pranks, but much of the film feels like it’s on an anti-depressant with few peaks and valleys. Still, the film has heart and is often quite amusing. Prepare for another inexplicably protracted Apatow running time, and just enjoy Davidson’s sprawling new rise to reels of royalty.