The Jeffy Puppet is a character from the popular YouTube channel SuperMarioLogan, created by Logan Thirtyacre. Jeffy is known for his distinctive blue helmet, yellow shirt, and his childlike behavior, which often leads to humorous and chaotic situations. He is portrayed as a mischievous and somewhat naive character, appealing to a wide audience. The character gained popularity due to his catchphrases and unique personality. Jeffy's interactions with other characters, such as Mario and Brooklyn T. Guy, often result in comedic scenarios. The puppet has become a significant part of the SuperMarioLogan franchise, contributing to its success and fanbase.