Johnny is a human member of S.T.A.R.S., friend to Sunstreaker and Ratchet in the Generation One continuity.
"Whenever I look at something reflective, I see a copy of myself inside it! This must be a Decepticon plot!"
Johnny is a Caucasian male in his early teens and (unbeknownst to his family) member of the Secret Transformer Autobot Rescue Squad. When a sudden power outage caused Johnny to suspect Decepticon activity, he rushed to his rooftop observatory, where he saw a strange light rising up to meet Thundercracker, who then circled looking for a landing zone.
Thundercracker is up to something! What, we may never know.
Johnny alerted his S.T.A.R.S. allies using the Communication Center at his desk.
Sunstreaker, Ratchet, Mirage and the Omnibots converged from multiple locations in response to his signal. Johnny was personally familiar with Sunstreaker and Ratchet already.
Johnny appeared in a 1985 mail-order catalogue which offered Thundercracker, the Omnibots, Ratchet, Mirage and Wheeljack.