Here:
Serial.print(buttons); //prints byte 1
Serial.print(dPads); //prints byte 2
Serial.print(ps2x.Analog(PSS_LY)); //prints left y thumbstick value
Serial.print(ps2x.Analog(PSS_LX)); //prints left x thumbstick value
Serial.print(ps2x.Analog(PSS_RY)); //prints right y thumbstick value
Serial.print(ps2x.Analog(PSS_RX)); //prints right x thumbstick value
Try adding DEC to them, as in:
Serial.print(buttons, DEC); //prints byte 1
and so on.