S1, E4: Experiment 254 is a stink bomb whose stench will make any area uninhabitable for decades. But he's also cute as the dickens, and everyone who sees him falls in love with him... everyone except Stitch, who resents all the time Lilo's spending with "Mr. Stenchy". Stitch gets so jealous of 254 that he lets him get captured by Gantu! Losing Mr. Stenchy makes Lilo so sad that Stitch can't take it anymore; he decides to re-capture Mr. Stenchy. Stitch sneaks aboard Gantu's ship to retrieve Mr. Stenchy... but even Gantu has fallen for the little guy!