is the title character of the series of the same name
. He (or some version of him) has appeared in every episode of the series, giving him the most appearances out of any character.
Although SpongeBob appears in every full-length episode of the series, he does not appear in several shorts. These include the "What If SpongeBob Was Gone?" shorts, "Friend or Foe" shorts, "Ask Patrick Anything," the Merry Nickmas shorts "Patrick the Snowman," "Plankton's Holiday Hits," "A Chuckie Finster Christmas, Channukah, Kwaanza, Winter Solstice" and the SpongeBob Gold short "Krabby Patty IRL."
Episodes in which more than one SpongeBob appear include "The Chaperone," "Sleepy Time," "Squilliam Returns," "The Sponge Who Could Fly," "Spy Buddies," "Overbooked," "Back to the Past," "SpongeBob You're Fired," "CopyBob DittoPants," and "Boss for a Day."
His only non-speaking appearances to date are "Reef Blower" and "Whale Watching."
Appearances = List of episodes
Episodes in which SpongeBob does not play a major role