He undertook the defense of the Church against Montanus, and followed in the footsteps of Zoticus of Comanus, Julian of Apamaea, Sotas of Anchialus, and Apollinaris of Hierapolis.
It also gave currency to the report of their suicide by hanging, and threw light on some of the adepts of the sect, including the apostate Themison, and the pseudo-martyr Alexander.
Themison, having evaded martyrdom by means of money, posed as an innovator, addressing a letter to his partisans after the manner of the Apostles, and finally insulted Jesus and Christianity.
Based on Eusebius, it is known that Apollonius spoke in his work of Zoticus, who, along with Julian of Apamea, had tried to exorcise Maximilla, but had been prevented by Themison, and of the martyr-Bishop Thraseas, another adversary of Montanism.
Moreover, he recounts the restoration to life of a dead man at Ephesus by John the Apostle, whose Apocalypse he knew and quotes.