Ricauter

That's true, I hadn't thought this way!! that's better than before. But I don't know why, the other one isn't working. It should work in both ways!!
The first one checks the monster name's, and the second one checks the monster ID's
But..  

was testing around, there was a mistake on the script, actually:
 
if(getmonsterinfo(killedrid,0)==getmonsterinfo(1008,0)) doesn't work at all, so any monster you'd kill would increase the counter, the real script is like this:
 
if(killedrid==1002) // and replace the 1002 for any monster ID that way, only the monster ID you choose would increase the counter.

File Name: Costume System
File Submitter: Mhalicot
File Submitted: 12 Oct 2013
File Category: Utility
 
~ Originally script by Rebel, Zephyrus [rAthena],
~ I don't own this script I'd revised it to make it compatible with Hercules.
~ [Original Topic] http://goo.gl/YU1Z7o
~ 100% compatible in (revision 137*)
Download contains: Costume System.diff and costume.txt
 
Click here to download this file

Hahah, no problem!!
 
Hey, I've just saw this line, it can bring you problem:
set f1ks,f1ks=0; test in your npc, if this doesn't give error, just forgot... but If does, do this way:
set f1ks,0;

according to this comment @ clif.c
/// Request to increase status (CZ_STATUS_CHANGE)./// 00bb <status id>.W <amount>.B/// status id:/// SP_STR ~ SP_LUK/// amount:/// Old clients send always 1 for this, even when using /str+ and the like./// Newer clients (2013-12-23 and newer) send the correct amount. solution will be by tweaking 'pc->statusup' by changing the amount increase to 1 then loop it having a delay per iteration until it reach the maximum desire amount...

@@Ricauter
 
That's because you didn't closed the "()"
 
copy and paste :
 
- script test1 -1,{ OnNPCKillEvent: set .@map$, "prontera"; if(strcharinfo(3)==.@map$){ if(getmonsterinfo(killedrid,0)==getmonsterinfo(1008,0)){ // PLEASE THIS WAY IS THE RIGHT WAY DON'T CHANGE AGAIN '-' set f1ks,f1ks +1;// to count +1 kills; announce "PORINGS KILLED +1 ["+ f1ks +"/5]",3; } if (f1ks >= 5){ set f1ks,f1ks=0; //to reset the counter and buff sc_start 10, 240000,10; }}end;}

Ah ok, because when you get errer from first line, the npc isn't readed.
 
I think your error is case sensitive:
-<tab>Script<tab>test1<tab>-1,{ try:
-<tab>script<tab>test1<tab>-1,{

Ah ok, that simple either!!
 
You can do this way:
 
OnNPCKillEvent:if(strcharinfo(3)== 'map'){if(getmonsterinfo(killedrid,0) == 'monstername'){ set mymobkills,mymobkills +1;// to count +1 kills }} if (mymobkills > 99){ set mymobkills,0; //to reset the counter and buff? sc_start 39, 60,5; getitem,-1,1;}end; where -1 means: a random item from OBB..
 
or if you preffer you can also use: -2,-3,-4,-5
Giving an item ID of -2 will produce the effects of Old Violet Box.
Giving an item ID of -3 will produce the effects of Old Card Album.
Giving an item ID of -4 will produce the effects of Gift Box.
Giving an item ID of -5 will produce the effects of Worn Out Scroll, which, in current SVN, drops only Jellopies anyway.