The Trabucaires d’en Perot Rocaguinarda were officially constituted in 1991 and presented to the public at the Horta neighbourhood's festa major that year. The idea of setting up another group of trabucaires in the city had occurred a year earlier during the Festa del Pi that is held in honour of Santa Coloma in Centelles, a town in the county of Osona. It's a time when the town's inhabitants parade and fire off salvoes with their trabucs  (blunderbusses) and on the main day of the festival you can find hundreds of trabucaires gathered there. Seeing all this close up encouraged a group of friends to set up their own colla de trabucaires.

They decided to adopt the name of one of the most famous Catalan bandits of the 17th century, Perot Rocaguinarda, aka Perot lo Lladre (the Thief). This native of Lluçanès and his deeds have become so legendary that they have inspired all kinds of romantic tales and songs. He even appears in the second part of Don Quijote.

Taking their inspiration from this character, the group decided to wear seventeenth-century clothes: a cocked hat with a feather, a Gascon cloak, a white shirt and a green velvet jacket. They also wear brown breeches, white stockings and brown leather shoes with laces. The girls wear a green velvet skirt with a white petticoat. Such fine clothes marked a break with the traditional trabucaire line.

From the beginning Perot Rocaguinarda's trabucaires have taken part in a lot of festive and social events, such as the national gatherings and the La Mercè festivities, where they form part of the popular retinue of festival figures and characters.