He first appeared in the episode "The Paper" when SpongeBob used his paper to make a ventriloquist dummy to tell him numerous jokes. He later made a second and more major appearance in the episode "Squid Wood." He was used as Squidward's replacement when Squidward refused to play with SpongeBob. Squidward was annoyed by Mini Squid. Squidward was initially happy when Mini-Squid "offered" to do his job, but he grew angry when Mini-Squid succeeded in places Squidward had failed by doing the exact same thing. For example, both Squidward and Mini-Squid asked, "Who ordered the Krabby Patty, and who ordered the Krabby Patty?" but the customers thought that it was funny only when Mini-Squid said it. The customers laughed at Squidward when he danced but said that Mini-Squid's dancing was good when Squidward did the same dance. Harold suggested that Squidward get size reduction surgery so that he could dance more like Mini-Squid, although his dance was exactly the same. The same thing happened when Squidward played his clarinet. Furious, Squidward attacked Mini-Squid. Then, a talent scout visiting the Krusty Krab offers Mini-Squid a job, which he took. In the end, Squidward's puppet problems were not solved, as SpongeBob had made a another puppet of himself.
Mini Squidward is very similar to the real Squidward. Though, his head is very large compared to his body than Squidward is to his body. Also his red pupils are thinner than Squidward's.
In the episode "The Paper," Lil' Squiddy looks fatter than in Squid Wood, as Mini Squid.
Just like Mini Squidward, Squilliam Fancyson is also better than Squidward, much to his dismay.
In The Paper, Lil' Squiddy (Mini Squid) is a little more green than Squidward.
Mini Squid is the first object that SpongeBob controls but then turns out to have a mind of its own. The second was the talking ice cream cone from Roller Cowards.