The MFC levels from 2002, including CFC. Yet again, the abbreviation (MFC) is a little off, it's just a name.

MFC:
"MFC is played like battle. Each player who joins the server will have to choose a class or job, which he will play as for the rest of the round (or till he rejoins). Each class has different characteristics. Some have ammo that others don't while some have unique abilities like having more places to go, having access to an airboard or carrot, etc. What different classes there are and how they are different, depends on each level. The host himself could play, but not until all his "guests" have arrived in the server, since he will mess up triggers otherwise (causing everyone who joins to have the same class as him/her). When making an MFC level, it's very important that you make all the jobs balanced. Don't make over-powered ones!"

CFC:
"In this pack you will also find a CMC (better known as Customizable Fighting Classes) level. In CMC, you won't have to choose between a set number of jobs, but you will be able to "make" your own one. You start with an amount of coins (in my level; 15), and with these coins you will be able to buy your characteristics; for example, ammo, airboard, carrot or the ability to swim or teleport. The rest of the game works exactly like battle or MFC, just kill the others with your powers !"

Because the filesize would get too big otherwise; I cut the pack in three parts.
Download the levels
Download the tilesets
Download the music files

The contents of the pack:

Medieval Fighting Classes (by Chiyu) 23-02-2002
Mexico MFC (by Chiyu) 29-07-2002
Castle Courtyard MFC (by Chiyu and Link) 23-03-2002
Invader's Homelands MFC (by Chiyu, Link and Young Link) 04-04-2002
Customizable Fighting Classes (by Chiyu and Link) 09-11-2002