The Jewel Triplets Gang are a gang of the three babies that appear in the SpongeBob SquarePants episode The Great Patty Caper and are infamous according to a cop that also appears in the episode. Two of the babies, which are male, in the gang are twins, while one of them, a female, looks completely different.
More near the beginning of the episode, SpongeBob and Patrick see them in the Oceanic Express's restaurant. However one of them are standing on top of another and in a disguise, which makes them look like an old lady. The other one is in a stroller. SpongeBob easily mistakes them for an old lady with her baby.
Later, in the episode, while a cop is searching the baby's diaper for the key, he finds Neptune's Jewel of the Sea. He then reveals to SpongeBob that the babies are the Jewel Triplets Gang and arrests them.
If you look at the legs of the "old lady" from earlier scenes, they are purple. This is illogical because only the female baby is purple.
The baby on the stroller can be distinguished from his twin brother by his freckles and yellow eyes (Notice the features on the picture).
The stroller itself is comprised of 'the defiled corpses of our victims', according to one of the twins.