If the funds are available as ETFs it's easy to convert and move. If you want to keep funds you can easily convert to a Vanguard brokerage account, move them there, and just pay one fee.
Folks are saying that you can have one mutual fund account (not brokerage) holding multiple funds. I looked at my old time Vanguard consolidated statement from 2003 and see that I had different account numbers for each fund.
In any case, Vanguard effectively treats funds in mutual fund accounts as separate accounts charging the $25 fee per fund.
Fidelity will frequently reimburse these charges. Call them and ask.