Jeremy appears to be some sort of elephant creature. He is rather shaggy, with light beige fur covering most of his body, excluding his red and white polka dotted mushroom. He also has a long trunk and large feet. In the episode "Bag of Naughty", it was revealed that he wears the cap of a mushroom to cover a large scar on his head that he got after playing with a Barkquiose Plant Pods.
Jeremy is quite peace loving and can be easily scared.