Within a few months Pinamonte was able to accuse and exile his co-rector Federico da Marcaria and the podestà, and gather power into his own hands.

Alberto I della Scala, lord of Verona, who favoured Bardellone's nephew Guido Bonacolsi, took immediate action and entered Mantua at the head of troops.

Della Scala deposed and exiled Bardellone and Tagino, and installing as ruler of Mantua, Guido Bonalcolsi, who then married Alberto's recently widowed daughter Costanza at the beginning of September.

Statute of 1303 made Guido Bonacolsi captain-general of the city and comune of Mantua and gave him unlimited powers, combining the executive, legislative, fiscal and judiciary, to "impose bans, absolve and convict... make war, enter truces, concords and peace, acquire friends, contract alliances, receive and rehabilitate exiles,appoint, install, dismiss, acquit and convict the podestà, rectors, judges, assessors, and all other officials and administrators, grant or remove their salaries,, convene councils and assemblies such that no councils, assemblies or meetings may be held without his special license..."[3] Guido died 24 January 1309, and was succeeded by his brother Rinaldo "Passerino", who had been an ally of Cangrande I della Scala.

A lesser member of the clan, the sculptor Pier Jacopo Alari Bonacolsi (c. 1460–1528), was nicknamed "L'Antico" by his contemporaries for his refined interpretation of the Antique.