looking for a way to change/rename specific files

Hello,
looking for a way to change/rename specific files. For exapmpe if I had a group of files that were named, “101 movie 1.avi” In have I have over movies that are sequential that I would like to change.
How could I eliminate the "100 " and sequentially all other number 101 - 202 from these files?

Thank you for your time and trouble,
paulmattallen