If we're talking normal shows, then:
http://www.youtube.com/watch?v=K41iLYVCBeg
http://www.youtube.com/watch?v=KmcZC0VbTiw
http://www.youtube.com/watch?v=lzFzKC_oZro&t=1m00s
If we're talking
my kind of shows, then:
http://www.youtube.com/watch?v=6RowccSD-lw&feature=related
http://www.youtube.com/watch?v=Vqvo0HpBzyk&playnext=1&list=PLE89F4230756205A8
http://www.youtube.com/watch?v=SwCYHXRB50U
http://www.youtube.com/watch?v=iVdWn2lFrT4&feature=related
http://www.youtube.com/watch?v=9tPgLq2xfTo&feature=related (yeah it's nothing special like the other ones, but I adore it all the same)
Edit:
http://www.youtube.com/watch?v=WE3d2GHBuvQ

That totally reminded me to post http://www.youtube.com/watch?v=K_AdxJWFUh4&feature=related. Talk about your classic Saturday morning cartoons.