Pt Chevalier hadn’t beaten Manurewa in their three previous encounters prior to Sunday’s decider at Jack Colvin Park, and had trailed 10-8 at half-time.
But back-to-back tries from Hall – who finished the day with three – and a brilliant second-half playmaking performance from Poko saw the Pirates to victory.
The Marlins scored first via Pahu Kani on 13 minutes before Pt Chevalier hit back with a pair of four-pointers to Va’anessa Molia-Fraser and Hall to take the lead.
It lasted only seconds though, with a Pirates knock on on the ensuing set gifting Manurewa with the field position which they turned into a Geneva Webber try.
Kere Matua converted for a 10-8 lead at the break.
Webber added a second three minutes into the second half and Matua converted to give their side an eight-point lead, but it was all down hill from there for the southern side.
First Poko produced a brilliant offload to send Hall over before the Brisbane Broncos’ star scored her third on the hour mark.
With the game tied at 16-16 inside the final 10 minutes, Poko again rose to the challenge, putting in a precision grubber for Hilda Peters to score a try which Poko then converted from in front of the posts.