A Quick Top 9: Teletoon's Longest-Running Original Series

From the article on Teletoon Original series on Wikipedia, I've listed these shows. I've excluded quarter-hour and interstitial shows, but included international co-productions: shows that Teletoon have had a hand in producing at some point. This list is current as of September 9, 2015 and you are more than welcome to dispute it.

9) Mega Babies
Produced by CinéGroupe, Landmark Entertainment Group, and Sony Wonder
4 seasons, 52 episodes
January 5, 1999 – April 1, 2001

8) Angela Anaconda
Produced by C.O.R.E. Digital Pictures, Decode Entertainment, and Angela Productions, Inc.
65 episodes
October 5, 1999 – February 24, 2002

7) Braceface
Produced by Nelvana
3 seasons, 78 episodes
June 30, 2001 – September 1, 2004

6) Chaotic
Co-Produced by Chaotic of America, 4Kids Entertainment, and Bardel Entertainment
3 seasons, 79 episodes
October 7, 2006 – March 13, 2010

5) Caillou
Produced by Elastic Rights, Clockwork Zoo, Cinar (1997–2004) and Cookie Jar Entertainment (2004–2012)
5 seasons, 92 episodes
September 15, 1997 – October 3, 2010

4) 6teen
Produced by Nelvana (season 1–3) and Fresh TV (season 4)
4 seasons, 93 episodes (including specials)
November 7, 2004 – February 11, 2010

3) Johnny Test
Co-Produced by Warner Bros. Animation (Season 1), Coliseum Entertainment (Season 2), and Cookie Jar Entertainment  (Season 2–6)
6 seasons, 117 episodes
September 17, 2005-December 25, 2014

2) Total Drama
Produced by Fresh TV and Neptoon Studios
5 seasons, 120 episodes (including specials)
Note: By surpassing Johnny Test and Kevin Spencer in episode count, I believe Total Drama is also the longest-running, domestically-produced, Canadian animated series.

1) Totally Spies!
Co-Produced by Marathon Media Group and Image Entertainment Corporation (season 3–5)
6 seasons, 156 episodes
November 3, 2001 – October 3, 2014
Note: Technically, Teletoon was not involved with the sixth season.