Mentioned in the painted ktitorial inscription running on the cornice of the northern and southern walls of the central aisle and in another painted ktitorial inscription on the western wall of the northern aisle of the Church of Saint Nicholas in Manastir in the region of Mariovo. He appears as κυρὸς in the inscription on the cornice of the northern and souther walls of the central aisle of the Church of Saint Nicholas in Manastir. He was a priestmonk and hegoumenos of the monastery. He was responsible for the renovation of the Monastery and the Katholikon of Saint Nicholas in Manastir in 1265. He commisioned the painted decoration of the church, which was accomplished by John, a deacon and refendarios, in 1270/1271 (Ὁ ναὸς γὰρ ἦν σμικρώτατος, σαθρὸς, ῥακοθεὶς δὲ καὶ διατετρωμένος ἀρραγῆς καὶ μὶ φέρων ὁρᾶν τὴν τοῦ ναοῦ σβέσιν ὁ πανοσιώτατος καθηγούμενος τῆς μονῆς ὁ κυρὸς Ἰωαννίκιος, ὁ καὶ διὰ τοῦ ἁγίου σχίματος ἐπωνομασθεὶς Ἀκάκιος καὶ χωρέσας ὑπὲρ χρημάτων ἀναχωρεῖ τοῦτον θεῖαν εὐσεβῆς ἐπιχωρῖν καὶ ἐν ὑπηρεσία ἄγειν ὁ καὶ προκαλέσας τοὺς ἐν Χριστῶ ἀδελφοὺς αὐτοῦ...ἅμα καὶ εὐθὺς χαλάσας τὴν ἐκκλησίαν ἀνήγυρεν ἐκ βάθρων τὸν πάνσεπτον ναὸν τοῦτον καὶ οραΐσας καὶ καλεῖ ἐν αὐτοῖς τὸν ἐν χρωματουργίμασιν πικυλοτρόποις καὶ ἐν βαθεῖ γνόμονας χεῖρας ταπινότατος Ἰωάννης διάκονος καὶ ἐπὶ τῶν κρίσεων τῆς ἁγιωτάτης ἀρχιεπισκοπῆς, καὶ...ἐν ἔτει ἐξακισχιλιστὸ καὶ ἑπτακοσιοστό τε ο δ, ἰνδικτιῶνος θ, ἀνιστορίθι δὲ ἐν ἕτι ς ψ ο θ, ἰνδικτιῶνος ιδ, ἐπὶ τῆς βασιλείας τοῦ εὐσεβεστάτου μεγάλου βασλέως καὶ αὐτοκράτωρος Ῥωμαίων Δοῦκα Ἀγγέλου Κομνηνοῦ Μιχαήλ τοῦ Παλαιολόγου καὶ Νέου Κωνσταντίνου). He is portrayed with the model of the church on the western wall of the northern aisle of the Church of Saint Nicholas in Manastir. The ktitorial painted composition is accompanied by the inscription, which stresses the role of Ioannikios/Akakios as the second ktetor of the church (δέησις τοῦ δούλου τοῦ θεοῦ Ἀκακίου ἱερομονάχου καὶ καθηγουμένου ...ορεντος. καὶ δευτέρου κτήτωρος).