He is currently the last episode character to be introduced, at the 99th episode, though a few other characters was created later (though present temporarily). He is also the last static character. There is a trend where episodes are reusing characters from previous episodes.
This is likely due to the naming of remaining characters.
At a current count of 191 episodes, this trend has maintained for 92 episodes.
The trend of a lack of new characters was temporarily broken with the appearance of Minty's Cake Quest characters and the Hen.
It is unknown if animated cutscenes or even new pathway shapes will be introduced afterwards.