The character , created by PERSON@1 and PERSON@2 , was voiced by PERSON@3 in the first and second seasons , but after PERSON@3 's death of esophageal cancer , PERSON@4 was voiced by PERSON@5 in the third season .

The character and series were created by PERSON@1 and PERSON@2 . PERSON@4 is voiced by PERSON@3 in seasons NUMBER@1 and NUMBER@2 , PERSON@5 onwards .
