Is parliament allowed to formulate any law they want

Re: Is parliament allowed to formulate any law they want

similarly..BB aws trying to ammend some powers of SC..in 1996..when allegations were made over BB by President...Laghari..it was allegation that BB tried to attck SC via parliment.....

and SC justified this over throwing and breaking of assemblies...

means that via parliment ammendment..SC powers cannot also be reduced....