Charles V returned to Spain on July 16, 1522.  Acts of repression and retaliation against former comuneros did occur, but only sporadically.  Embarrassingly large numbers of important people had supported the comuneros, or at least were suspiciously slow to declare allegiance to the king, and Charles thought it unwise to press the issue too much. Back in Valladolid, Charles declared a general pardon on November 1.  The pardon gave amnesty to everyone involved in the revolt with the exception of 293 comuneros, a small figure given the huge number of rebels.  Both Pacheco and Bishop Acuña were among the 293 excluded from the pardon.  More pardons were issued later, after pressure from the Cortes; by 1527, the repression was completely at end.  Of the 293, 23 were executed, 20 died in prison, 50 purchased amnesty, and 100 were pardoned later.  The fates of the rest are unknown.
Question: Who was responsible for pressuring for more pardons?
Answer: the Cortes; Cortes