I am curious as to whether I can transfer a mutual fund from a regular brokerage account to a Roth IRA. I can' seem to find a straight answer anywhere... I was hoping I could find some help here.
Thanks.

You fund a Roth with cash. You can not transfer any other kind of assets from a brokerage into a Roth. You can certainly sell the fund, then use cash to fund your Roth. Remember, selling is a taxable event.