According to Sri Chaitanya’s authorized biographies, then, shad-bhuja-murti was revealed three times, in the following order:
1. To Nityananda Prabhu in Srivasa Thakura’s house in Mayapur. This occurred during the Vyasa-puja celebration (worship of Vyasadeva), the day after Mahaprabhu and Nityananda met for the first time. (See Chaitanya-bhagavata, Madhya 5.92; Sri Chaitanya-candrodaya, Act II, text 75; and Chaitanya-charitamrita, Adi 17.12.) Incidentally, according to both the Sri Chaitanya-candrodaya, Act II, text 77, and the Chaitanya-charitamrita reference cited above, Nityananda saw a different version of the six-armed form, with hands holding conch, disc, club, lotus, bow, and flute.
2. To Sarvabhauma Bhattacharya in his house in Puri, soon after the Lord first arrived there. (See Chaitanya-bhagavata, Antya 3.100–105, and Srila Prabhupada's purport to Chaitanya-charitamrita, Adi 10.130, as well as his Teachings of Lord Chaitanya, chapter 26.)
3. To Maharaja Prataparudra, two years after the Sarvabhauma revelation, when the Lord returned from His South Indian tour. (See Murari Gupta’s Sri-krishna-caitanya-carita-mahakavya 4.16.14–20 and Locana Dasa’s Chaitanya-mangala, Sesha-kanda, Song 12, Texts 113–115.)
https://www.google.com/search?q=Six-Armed+Form
1. To Nityananda Prabhu in Srivasa Thakura’s house in Mayapur. This occurred during the Vyasa-puja celebration (worship of Vyasadeva), the day after Mahaprabhu and Nityananda met for the first time. (See Chaitanya-bhagavata, Madhya 5.92; Sri Chaitanya-candrodaya, Act II, text 75; and Chaitanya-charitamrita, Adi 17.12.) Incidentally, according to both the Sri Chaitanya-candrodaya, Act II, text 77, and the Chaitanya-charitamrita reference cited above, Nityananda saw a different version of the six-armed form, with hands holding conch, disc, club, lotus, bow, and flute.
2. To Sarvabhauma Bhattacharya in his house in Puri, soon after the Lord first arrived there. (See Chaitanya-bhagavata, Antya 3.100–105, and Srila Prabhupada's purport to Chaitanya-charitamrita, Adi 10.130, as well as his Teachings of Lord Chaitanya, chapter 26.)
3. To Maharaja Prataparudra, two years after the Sarvabhauma revelation, when the Lord returned from His South Indian tour. (See Murari Gupta’s Sri-krishna-caitanya-carita-mahakavya 4.16.14–20 and Locana Dasa’s Chaitanya-mangala, Sesha-kanda, Song 12, Texts 113–115.)
https://www.google.com/search?q=Six-Armed+Form