The bubbly reality stars have been training intensely to compete in The Royal Queensbury Championship.
"Shaz and I have been bluing since yea high so it's not going to be a problem," Michelle joked to 9 News Perth.
"Her only fear is potentially getting knocked out by me in the ring!
"Our strengths lie in different areas. She's [Sharon] quicker but I've got more power in me."
Sharon added: "We're nervous and excited."
The pair are aiming to raise money for “sick and disadvantaged” children, Sharon said on Instagram.