After repeatedly being thwarted by heroes such as Daredevil, Spider-Man, and Iron Man, Vincent serves a prison term and retires the Leap-Frog identity, now ashamed of his criminal actions.

To make his father proud and alleviate the man's guilt, 15-year-old Eugene decides to use the Leap-Frog costume and technology to perform good deeds as "the fabulous Frog-Man.

[2] At one point, Frog-Man forms a team called the Misfits alongside the mutant Toad and the teenager Spider-Kid, but the trio disbands almost immediately.

[2] Later, Eugene is a registered member of the Avengers Initiative and serves in a Kentucky-based team called the Action Pack, but is almost immediately captured and replaced by an alien impostor.

[4] The character made his live-action debut in the Marvel Cinematic Universe television series She-Hulk: Attorney at Law (2022), played by Brandon Stanley.

Named "Frog-Man", this new character was introduced as Eugene's previously unknown son in Marvel Team-Up #121 in June, 1982 (with a cover date of September).

[5] Frog-Man's first appearance establishes that Vincent Patilio is a widower with a teenage son, that he served a short prison term after the events of Iron Man #126-127 and was released on parole, and that he now regrets his actions as Leap-Frog.

The story introduces Vincent's teenage son Eugene, who decides to adopt the Leap-Frog costume use it to defeat the villain Speed Demon, a task Spider-Man and the Human Torch are already attempting to achieve.

In the story, Frog-Man joins Spider-Man against a new villain called the White Rabbit, a woman whose costume and crimes take inspiration from Alice in Wonderland.

[7][8] Frog-Man appears again in The New Defenders #131 (May, 1984), in a story plotted by his creator J. M. DeMatteis, scripted by Peter B. Gillis, and with art by Alan Kupperberg and Christie Scheele.

[2] No subsequent stories are ever published featuring the Misfits as a team and Marvel information guides later clarify the trio disbanded almost immediately.

Frog-Man then aids Captain America and the superheroes he previously met (Angel, Iceman, Beast, Human Torch, and Spider-Man) against the villain Yellow Claw.

The story explains Eugene's absence from comics since 1987 as a result of the young man now attending college and living on a campus outside of New York City.

Eugene then makes a cameo in Avengers: The Initiative #20 (2008), now back on Earth and attending a support group of people whose identities were stolen by Skrull infiltrators.

Frog-Man appears again in Spider-Island: The Avengers (2011), in a story written by Chris Yost with art by Mike McKone and Jeremy Cox.

Angry, he uses his invention of electrical "leaping coils" to become the villain Leap-Frog, donning a specially padded suit to protect him from surface impact.

He serves a short prison term and is released on parole due to his cooperative attitude and having caused no deaths, serious injuries, or damage during his crimes.

Eugene sees his father remains humiliated and depressed concerning his career as Leap-Frog and at times is emotionally triggered by reminders of his criminal actions.

Hoping to counter this turmoil, Eugene decides to use the Leap-Frog suit to become a superhero so his father will conclude that his actions and inventions also led to something good.

Although Spider-Man, the Torch, and Vincent all advise that Eugene never again attempt such a dangerous act, the teenager swears he will make his father proud as the "fabulous Frog-Man.

Learning that Defenders member Dr. Hank McCoy (the Beast) is lecturing at a local university, Eugene attends and dons his Frog-Man suit, asking to audition for the team.

Taking inspiration from his favorite Beatles song, he dubs himself "the Walrus" and attacks the same university event just as the heroes Beast, Angel, and Iceman are rejecting Frog-Man's request to join their team.

[9] No longer wishing to be a villain and believing he has no purpose in life, the former mutant terrorist called Toad attempts suicide but is saved from a lethal fall by Spider-Man.

Spider-Man and Vincent quickly gain respect for each other, and the web-slinging hero realizes Eugene's father reminds him of his own departed Uncle Ben Parker.

However, Frog-Man is able to win the trust and affection of the giant frogs and leads them into battle against the Yellow Claw's forces, joined by Captain America, Spider-Man, Angel, the Beast, Iceman, and the Human Torch.

Spider-Man comes to know the family and Eugene's upbringing much better, but the evening is interrupted when news breaks that the White Rabbit and the Walrus have returned and are causing chaos.

[17] After returning to Earth, Eugene briefly participates in an emotional support group made up of Initiative members whose identities were stolen by the Skrulls.

[20] He is later seen with the team during a massive earthquake caused by a battle between Gravity and Hardball and helps them in their fight against Thor Girl, who had recovered her designated powers.

Although his actions cause danger to himself and inadvertently lead Ms. Marvel to have her nose broken, Frog-Man succeeds in saving Hawkeye's life and then defeats Flag-Smasher by vomiting on the villain (a result of nausea due to consuming too much chili before battle).

The original, classic costume (first worn by his father as the villain Leap-Frog) was specially padded to protect the wearer from surface impact and attacks by combatants who may have some small degree of superhuman strength.