Jacques Foccart first appeared as Invisible Kid II in The Legion of Super-Heroes Annual (DC, 1982 series) #1 ([August] 1982).
Rebirth reality: This version of Invisible Kid was introduced in his invisible state (voice only) in Legion of Super-Heroes: Millennium (DC, 2019 series) #2 (December 2019); in that issue he referred to himself as "Lyle" (changed to "Jacques" when the story was reprinted in the collected edition). He was first visibly seen in Legion of Super-Heroes (DC, 2020 series) #5 (May 2020), where he was established as Jacques Foccart of Earth; in that issue Jacques insisted that his codename is "The Invisible Gentleman" and that he hates the name "Invisible Kid", but his teammates ignore his preference. In Legion of Super-Heroes (DC, 2020 series) #9 (November 2020), Jacques stated he is from the planet Kit-Son; in that issue he referred to himself as "Invisible Kid".