Johnny's primary power is the ability to envelop his entire body in fire without harm to himself, in which form he is able to fly and to generate powerful streams and/or balls of fire. He can also manipulate his flame into any shape. Even when not engulfed in flame himself, he has the ability to control any fire within his immediate range of vision, causing it to increase or decrease in intensity or to move in a pattern directed by his thoughts. He is also able to absorb fire into his body with no detrimental effects.

He is able to fly in excess of the speed of sound. The plasma field immediately surrounding his body is sufficiently hot to vaporize projectiles that approach him, including but not limited to bullets. He does not generally extend this flame beyond a few inches from his skin, so as not to ignite objects (or persons) in proximity to him. Johnny refers to his maximum flame output as his "Nova Flame," which is released omni-directionally and can reach 1,000,000 degrees Fahrenheit. He can also direct beams of "Nova Heat" as an offensive weapon for very brief periods of time before his energy reserves give out. Johnny has a high degree of control over his powers. He can hold a person while in his flame form without the person feeling the slightest bit of heat.