Now after describing this remaining kings were described who blew up their conch shells.

Bg 1.16-18

anantavijaya rājā
kuntī-putro yudhiṣṭhira
nakula sahadevaś ca
sughoa-maipupakau

kāśyaś ca paramev-āsa
śikhaṇḍī ca mahā-ratha
dhṛṣṭadyumno virāṭaś ca
sātyakiś cāparājita

drupado draupadeyāś ca
sarvaśa pthivī-pate
saubhadraś ca mahā-bāhu
śakhān dadhmu pthak pthak

Word for word: 

ananta-vijayam — the conch named Ananta-vijaya; rājā — the king; kuntī-putra — the son of Kuntī;yudhiṣṭhira — Yudhiṣṭhira; nakula — Nakula; sahadeva — Sahadeva; ca — and; sughoa-maipupakau — the conches named Sughoa and Maipupaka; kāśya — the King of Kāśī (Vārāṇasī); ca — and; parama-iu-āsa— the great archer; śikhaṇḍī Śikhaṇḍī; ca — also; mahā-ratha — one who can ght alone against thousands;dhṛṣṭadyumna — Dhṛṣṭadyumna (the son of King Drupada); virāṭa — Virāṭa (the prince who gave shelter to the Pāṇḍavas while they were in disguise); ca — also; sātyaki — Sātyaki (the same as Yuyudhāna, the charioteer of Lord Kṛṣṇa); ca — and; aparājita — who had never been vanquished; drupada — Drupada, the King of Pāñcāla; draupadeyāḥ — the sons of Draupadī; ca — also; sarvaśa — all; pthivī-pate — O King; saubhadra — Abhimanyu, the son of Subhadrā; ca — also; mahā-bāhu — mighty-armed; śakhān — conchshells; dadhmu — blew; pthak pthak — each separately.

Translation: 

King Yudhiṣṭhira, the son of Kuntī, blew his conchshell, the Ananta-vijaya, and Nakula and Sahadeva blew the Sughoa and Maipupaka. That great archer the King of Kāśī, the great ghter Śikhaṇḍī, Dhṛṣṭadyumna, Virāṭa, the unconquerable Sātyaki, Drupada, the sons of Draupadī, and others, O King, such as the mighty-armed son of Subhadrā, all blew their respective conchshells.

anantavijaya rājā
kuntī-putro yudhiṣṭhira

So it is interesting on Pandavas side first Krishna and arjuna was described then Bhima was described and after that Yudhisthira is described. Although Yudhisthira is the king from the point of view of significance in the battlefield the most influential warrior was first of all Krishna and Arjuna the combination then second most was Bhima and after that was Yudhisthira then Nakula. Yudhisthira conch shell was anantavijaya and Nakula and Shahdeva conch shell was sughoa and maipupakau then the whole list like Kashi raja was described once more he was a famous archer, śikhaṇḍī ca mahā-ratha, śikhaṇḍī was Amba (or one of the  queen) and he was destined for the death of Bhishma. dhṛṣṭadyumno was one of the formidable warrior on the side of Pandavas and virāṭa is there the king in whose palace the Pandavas served in Agyatvas and sātyakiś cāparājita, this can be split in two ways as sātyakiś cā + aparājita, means sātyakiś was aparājita OR sātyakiś cāp + arājita, cap means bow so one who is decorated with bow. Then drupado draupadeyāś ca,

sarvaśa pthivī-pate

All of them are pthivī-pate, kings of the world

and saubhadraś ca mahā-bāhu, saubhadraś is Abhimanu who is referred specially because he is a formidable warrior and they all blew their conch shells, śakhān dadhmu pthak pthak.