05/01/2012 10:20 am ET Updated May 03, 2012

Ben Roseth, Minnesota 'Power Boy' Battling Rare Disease, Fights Illness With 'Superhero' Siblings

A rare, fatal disorder often zaps 8-year-old Ben Roseth’s strength, but it hasn’t taken away his power.

According to HLN, Ben suffers from Adrenoleukodystrophy (ALD), a condition that affects 1 in 20,000 people and has no cure. Though Ben often gets so tired that he can’t stand, he -– and his brave siblings –- won’t stop fighting the disease.

To help Ben muster the strength to stand up to ALD, his brother and two sisters gave him a superhero identity and named him Power Boy. Soon after, he stopped fearing his frequent hospital visits and tests, his mom wrote on his Facebook wall.

“Ben used to cry and scream and fight anytime we went near the local clinic. He would burst into tears at the smell of rubbing alcohol,” his mom wrote on his Facebook page. “Power Boy doesn't fear the tests much anymore.”

Power Boy’s three siblings each took on a superhero identity, eventually becoming the Fearsome Four. The crew is using its power of perseverance to empower Ben, raise awareness about his condition and help others in need.

The “Fearsome Four” have cleaned up neighbors’ yards and donated teddy bears to children in hospitals, HLN reports.

“He faces so many difficult things,” Ben's mother told HLN, “and they face them together.”

Click through the slideshow below to see even more inspiring photos of the Fearsome Four.