Multiple things were used in this 1 Some basic synth sound I found kzbin.info/www/bejne/g2OqopmrmrCobNkfeature=shared 2 A cat standing on someone's keyboard kzbin.infohrO1saAMjq0?feature=shared 3 The Regular Show theme song kzbin.info/www/bejne/f3-VY6SQpZeGsM0feature=shared 4 Some basic drum sound effects And 5 a pop sound effect