Remove sequel number from title

I am trying to change this: Big Monster 4: Blah Blah Blah

to this Big Monster: Blah Blah Blah

I thought using replace would do it, tried all kind of variations of what is down below. I basically want to take out sequel numbers whether it is a digit or roman numeral. Already have learned how to remove everything after the colon now I just need to get it down to the Title only if sequel numbers are involved.

$replace() replaces fixed strings with each other.

If you want to replace a pattern, you have to use a regular expression

Try
Format string: $regexp(%comment%,(.*) \d+(.*),$1$2)

I don't think that \d+ would replace a roman numeral?

Roman numerals are pretty tricky to detect because of the different spelling.
For example the digit 990 can be written as XM, as well as CMXC.

Or sometimes you see IIII which is the same as IV.