Overview
Ben gains another Omnitrix hero to use, which he calls Ditto. Gwen can't stand being around the multiplying Dittos, and they end up giving her headaches. The Dittos, though, prove to be real helpful against Dr. Animo and his multiplying Stinkflies after he extracted some of Ditto's DNA.
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4 - 1Perfect Day July 07, 2007 -
4 - 2Divided We Stand July 14, 2007 -
4 - 3Don't Drink the Water July 21, 2007 -
4 - 4Big Fat Alien Wedding July 28, 2007 -
4 - 5Secret of the Omnitrix (1) August 04, 2007 -
4 - 6Secret of the Omnitrix (2) August 04, 2007 -
4 - 7Secret of the Omnitrix (3) August 04, 2007 -
4 - 8Ben 4 Good Buddy September 22, 2007 -
4 - 9Ready to Rumble September 29, 2007 -
4 - 10Ken 10 October 06, 2007 -
4 - 11Ben 10 vs. Negative 10 (1) March 09, 2008 -
4 - 12Ben 10 vs. Negative 10 (2) March 09, 2008 -
4 - 13Goodbye and Good Riddance April 15, 2008