The Trouble Boys
Founded by Roscoe James (who eventually became the current incarnation of Jack-in-the-Box), they admire Jack-in-the-Box and always try to outdo his acrobatics, as he soars along the rooftops.
The Trouble Boys are not actually out to cause trouble, but to avoid or stop it. They've aided Jack-in-the-Box on more than one occasion, including when three possible future sons of Zachary Johnson, the second Jack-in-the-Box, came back in time to meet him (and kill him, in two of the cases).
Before becoming the next Jack-in-the-Box, Roscoe feared that some Trouble Boys might join The Deacon, who was sniffing around for possible recruits to his organization.
It's not known if the Trouble Boys are still active today after Roscoe left, or if him taking over as Jack-in-the-Box actually helped keep his fellow Trouble Boys out of, well, trouble...