X-Men: The 198 Files reveals that not only has he kept his powers after the "Decimation" of the mutant population, but the government considers him a 'Severe' national security threat. For some time he lives in the tent city located on the grounds of the Xavier Institute. He is assigned to share a tent with Toad, but he prefers the company of Erg, Sack, and Mammomax. He is one of the many mutants to have a "tracking" chip implanted in his head before a trip into the nearby town of Salem Center. When the chip's true nature is discovered he has it removed by Mr. M, whom he follows when he leads an exodus from the institute. During Apocalypse's recent attack on the institute he is seen siding with Apocalypse along with Skids and Scalphunter inside the floating Sphinx.
Fever Pitch is one of the many mutants that revolts against Sentinel Squad O*N*E during Domino and Shatterstar's successful attempt to release the mutants "relocated" at the Xavier Institute. Many of the mutants escape to further battles and confrontations.
Fever Pitch was captured by the Purifiers and injected with a new form of the Legacy Virus. He was then pushed into a large crowd of anti-mutant protesters, where the Purifiers intended for him to lose control of his powers and make martyrs of the protesters. X-23 picked up the scent of his fire but as Fever Pitch began to scream, it was too late. His powers went nova, firing a massive wave that incinerated a large proportion of the crowd and himself. It is assumed that Fever Pitch did not survive the ordeal.
With the manifestation of his powers Fever Pitch was reduced to a flaming skeleton. He is capable of extending that biological flame outwards as intense heat, explosive blasts, or use it for flight. If, as he claims, his abilities are similar to Chamber's then he also does not have a need to eat, drink, or breathe oxygen.