I can find absolutely nothing to confirm that. Sounds like something from a tabloid. I did find this though:

In 1986, the tabloid press ran a story claiming that Jackson slept in a hyperbaric oxygen chamber to slow the aging process; he was pictured lying down in a glass box. Although the claim was untrue, Jackson disseminated the fabricated story himself. The singer was promoting his upcoming film Captain EO and wanted to promote a science fiction image of himself.
Jackson bought and befriended a pet chimpanzee called Bubbles, an act which extended his eccentric persona. In 2003, the singer claimed that Bubbles shared his toilet and cleaned his bedroom. Later, it was reported that Jackson bought the bones of The Elephant Man. Although untrue, it was a story that Jackson again disseminated to the tabloid press. These stories inspired the pejorative nickname "Wacko Jacko", which Jackson acquired the following year. He would eventually come to despise the nickname. Realizing his mistake, he stopped leaking untruths to the press. However due to the profit being made, the media began making up their own stories

The '80s were Jackson's heyday, and it's accurate to view the decade as a simpler time. Celebrity journalism hadn't devolved into the lowest-common-denominator turkey shoot it is now. Rumors of Jackson's eccentricity -- a pet chimpanzee, a hyperbaric chamber, the Elephant Man's bones -- were spread playfully by Jackson himself. During this period, pop was in its primacy and Jackson truly was the king.
From: http://music.msn.com/michael-jackson...ure/?gt1=28102

and http://en.wikipedia.org/wiki/Michael_Jackson (with sourced footnotes)