original characters (65 episodes, 2005-2016)
original characters created by (39 episodes, 2012-2020)
original idea (10 episodes, 2003-2005)
characters created by (9 episodes, 1987-2005)
story lines (3 episodes, 1987)
original characters/original idea (2 episodes, 2005)
original characters/story lines (2 episodes, 1987-1994)
story line (2 episodes, 1987)
creator (unknown episodes)
based on characters created by (1 episode, 2016)
original idea (80 episodes, 1987-2016)
based on an original idea by (40 episodes, 2012-2020)
original idea (79 episodes, 1987-2016)
based on an original idea by (39 episodes, 2012-2020)
original characters/original idea (1 episode, 2004)
head writer (90 episodes, 2012-2020)
written by (25 episodes, 2012-2020)
(99 episodes, 2008-2021)
staff writer (1 episode, 2020)
head writer (80 episodes, 2012-2020)
written by (16 episodes, 2012-2020)
writer/head writer (9 episodes, 2012-2016)
head writer (10 episodes, 2008-2009)
writer/head writer (6 episodes, 2008-2009)
(18 episodes, 2008-2009)
head writer (11 episodes, 2008)
writer/head writer (6 episodes, 2008)
written by (1 episode, 2008)
written by (8 episodes, 2012-2020)
(14 episodes, 2012-2021)
(13 episodes, 2008-2016)
written by (6 episodes, 2012-2016)
(11 episodes, 2013-2018)
written by (5 episodes, 2016-2018)
(10 episodes, 1987-1994)
written by (3 episodes, 1987)
(9 episodes, 2008-2009)
written by (1 episode, 2009)
written by (9 episodes, 2008-2009)
(8 episodes, 2012-2016)
written by (3 episodes, 2016)
writer (2 episodes, 2012-2014)
(8 episodes, 2020-2023)
written by (1 episode, 2020)
story editor (5 episodes, 2005)
by (3 episodes, 2003-2005)
(7 episodes, 2003-2005)
written by (5 episodes, 2012-2020)
(7 episodes, 2012-2020)
(5 episodes, 2003-2005)
assisted by (4 episodes, 1987-1994)
(4 episodes, 2005)
by (2 episodes, 2005)
(4 episodes, 2012-2014)
written by (2 episodes, 2012)
written by (2 episodes, 2016)
(3 episodes, 2016-2021)
(2 episodes, 2005)
by (1 episode, 2005)
writer (2 episodes, 2009)
(2 episodes, 2013-2014)
(2 episodes, 2020-2021)
(1 episode, 2005)
writer (1 episode, 2005)
(1 episode, 2012)