Justin (84 episodes, 2011-2023)
Robert the Robot (83 episodes, 2011-2021)
Little Monster (67 episodes, 2011-2023)
Dee Livery (23 episodes, 2011)
Cat (14 episodes, 2016-2017)
Mac The Explorer (11 episodes, 2014-2015)
Chris / Robert the Robot / Self - Invited Guest (5 episodes, 2011-2023)
Pui / Self - Invited Guest (3 episodes, 2012-2014)
Mr. Bloom / Reggie (3 episodes, 2015-2017)
Andy / Self - Guest (2 episodes, 2011-2013)
Cook / Plumber (2 episodes, 2015-2017)
Line (2 episodes, 2016-2017)
Cook (2 episodes, 2016-2017)
Nisha (1 episode, 2011)
Alex (1 episode, 2011)
Emma (1 episode, 2011)
(1 episode, 2012)
Summer Salt (1 episode, 2012)
(1 episode, 2013)
Captain Sinker (1 episode, 2014)
Funella Furchester (1 episode, 2014)
Gem (1 episode, 2014)
Rebecca (1 episode, 2014)
Leo Tard (1 episode, 2014)
Quick Change Artist (1 episode, 2014)
Sid (1 episode, 2014)
(1 episode, 2015)
Magician (1 episode, 2015)
Junk Musician (1 episode, 2015)
Secret Detective (1 episode, 2016)
Self (1 episode, 2016)
Chef Judge 2 (1 episode, 2016)
Chef Judge 3 (1 episode, 2016)
Chef Judge 1 (1 episode, 2016)
Self - Performer (1 episode, 2016)
Iris Shutterspeed (1 episode, 2017)
Little Justin (1 episode, 2017)
Tom (1 episode, 2021)
Pigeon (1 episode, 2023)
Cousin Mac (1 episode, 2023)
Moxy (1 episode, 2023)
Rio (1 episode, 2023)
Blu (1 episode, 2023)
Auntie Justina (1 episode)
Mr. Finchbottom (1 episode)
Chucklefoot (1 episode)
Wanda Round (unknown episodes)