Tronji takes place in the CGI-animated universe of Tronjiworld, where creatures known as Tronjis live happily. However, all of that changed when Tronjiworld was struck by a natural disaster, known simply as "Wobble", which caused immense destruction to Tronjiworld by draining away its colour and happiness and causing all Tronjis to cry, and even separated several parts of it away into an area known as The Gap, which is a space-like void filled with asteroids. Each episode follows the Great Eek summoning three children from Peopleworld and enlisting their help in reaching the saddest part of the broken pieces of Tronji and repair the damage done using their special skills, whilst the Great Eek and Tronji-O locate Tronji-I in Peopleworld, who usually materializes within an unhappy situation, in which the Great Eek and Tronji-O will use gem power from the children to fix the situation and therefore use Double Happiness to return the broken pieces back together.
Characters
The Great Eek - The ruler of Tronjiworld who lives within the Dome and watches over the world. He is a pale-skinned being dressed in purple, including a large top hat with a jewel on the front and carries a cane which doubles as a wand, which he uses to reconnect the broken pieces of Tronjiworld. Whenever trouble strikes in Tronjiworld and there are significant levels of sadness, he will summon three skilled children from Peopleworld to help him in fixing the problem. His catchphrases are "Wobbly-I-O!" and "What a wobbler!".
Tronji-O - A female Tronji who has a red, egg-shaped body, a golden disc on her stomach and three short hairs on her head. She often assists The Great Eek in helping to restore happiness to Tronjiworld and Peopleworld, seeing as her brother Tronji-I always gets taken to Peopleworld whenever Wobble strikes. She communicates in a series of squeaks, including the signature Tronji phrase "Nik-Nak-Nor" and when she is upset, she wails loudly.
Tronji-I - Tronji-O's twin brother. He is identical to his sister, except he is coloured dark blue and wears a golden belt around his stomach. Whenever Wobble strikes, he is often accidentally teleported to Peopleworld, where he usually appears within an unhappy situation, but once Tronji-O is able to make contact with him, they will use their powers to make a swap, which will usually result in the Peopleworld situation changing to happiness, but also causing another problem in Tronjiworld.
Ooee-Ooee - A flying, cloud-like Tronji who always says his name and flashes as he does. During missions, he gives one of the children a ride to the place with the most sadness in time for the "Happy Ending". When the Great Eek uses his powers to bring the broken pieces of Tronjiworld back together, Ooey-Ooey turns golden, a result of 'Double Happiness'.
The Gap Minders - A pair of guards who protect The Gap. In order to pass them, the children must answer the Gap Minders' Impossible Question, which is normally a mathematical question relating to the subject of the children's skills.