Mordicus through the years

{| border=2 cellspacing=0 cellpadding=8 style="border-collapse:collapse" ! Image !! width=100| As seen in / Year !! Notes (1978) (1979-1981) (1982-1985) (1986-1994) (1995-2005) (2006-present)
 * - bgcolor=#eeeeee
 * align=center | Rue Sesame season 1
 * align=center | Rue Sesame season 1
 * align=center | Rue Sesame season 1
 * Moridcus started out as a bit of a monkey-like creature, not really looking like a grouch. The muppet was a bit creepier thsn later versions. Due to this, it only lasted the first season.
 * align=center | Rue Sesame season 2
 * align=center | Rue Sesame season 2
 * align=center | Rue Sesame season 2
 * Mordicus gets a bit more friendly appearance. His ears are also smaller to look less like monkey ears.
 * align=center | Rue Sesame season 5
 * align=center | Rue Sesame season 5
 * align=center | Rue Sesame season 5
 * Mordicus' ears are changed to dark blue ears to match the rest of his body, as he is starting to look more like a traditional grouch.
 * align=center | Rue Sesame season 8
 * align=center | Rue Sesame season 8
 * align=center | Rue Sesame season 8
 * Mordicus loses all traces of his previous monkey appearance, and gets a eyebrow with mechanism, similar to Bert's. Sometime in season 10, the original tin saxophone is replaced with a plastic replica version due to the original starting to rust.
 * align=center | Rue Sesame season 16
 * align=center | Rue Sesame season 16
 * align=center | Rue Sesame season 16
 * Mordicus' fur is made a little lighter, but the nose remains the same. His head also grows in size.
 * align=center | Rue Sesame season 26
 * align=center | Rue Sesame season 26
 * align=center | Rue Sesame season 26
 * Mordicus gets new live hands, replacing the original rod hands that he had since season 1. He also gains a tongue.