Members: Saša Friš, Miroslav Mijatović, Srđan Milovanović, Željko Jojkić, Goran Biševac, Slobodan Stanojević, Nenad Kovačević, Vihor Ristić, Andraš Išpan, Srđan Golubica

Pero Defformero is a progressive metal (with folk/šator/montarbo vocals) band from Novi Sad, Serbia formed in 1993.
Band members:
Saša Friš Skylab - guitar, tambura, organ
Željko Jojkić - vocals (1993-1995)
Tibor Lakatoš - bass (1993-1995)
Srđan Milovanović Điđa - drums, tapan, organ (1993-1996)
Miroslav Mijatović - bass, begeš (1995-2006)
Goran Biševac Biške - vocals (from 1995)
Slobodan Stanojević - drums (1996-2012)
Nenad Kovačević - bass (from 2007-2012)
Vihor Ristić - bass (from 2012)
Srđan Golubica - drums (2012-2016)
Luka Jelisavčić - drums (from 2016)
Their music is influenced by Dream Theater and Južni Vetar.
Being a genetic crossover of John Petrucci’s and Šaban Šaulić’s children, after growing up rapidly, they recorded the one and only cult self titled album in 1995, well known by prog metal lovers from Yugoslavia.
Band was inactive in period 1997-2003.
In 2008, band released one new album. It is described as being the very best of Serbian horror-porno-folk-metal!