Jyabil

Check the topic below as it has the same request as yours.
http://rathena.org/board/topic/96093-qrpromo-npc/

Change this one
setarray .RandItem[0],501,502,503,504,505; // Put all the items here  To:
if (rand(100) < 10) { setarray .RandItem[0],501,502,503; // Items with 10% Chance } else { setarray .RandItem[0],501,502,503; // Items with 90% chance }

As per the script that EL Dragon posted, here's a GM activated version.
prontera,100,100,4 script Who's Online Event 99,{ if (getgroupid() == 99) goto Event_Menu; mes "[Who's Online Event]"; mes "Only GM's are allowed to use this NPC."; close; Event_Menu: set .@invokeid,getcharid(3); mes "[Who's Online Event]"; mes "Enable event?"; menu "Yes",-,"No",Event_End; while(1){ query_sql "select account_id from `char` where online = 1 order by rand() limit 1", .@aid; attachrid .@aid; if( CheckVending() ){ DetachRID(); continue; } announce strcharinfo(0) +" won 500 Cash in Who's Online Event", 0,0x00FF00; set #CASHPOINTS,#CASHPOINTS+500; dispbottom "You got 500 cash point"; break; } attachrid(.@invokeID); close; Event_End: close; }

I would suggest using Decrease Agility Skill or @speed command.
 
Decrease Agility:
prontera,50,50,3 script Slower 100,{ sc_start SC_DECREASEAGI,50000,10; // 50 seconds end; } @speed:
prontera,50,50,3 script Slower 100,{ atcommand "#speed "+strcharinfo(0)+" 200"; // Just change the 200 for the speed you wanted end; } But you need something like a trigger to make the speed default. If it is an event, they can talk to an npc or enter a portal and insert the code below.
 
@speed (default):
atcommand "#speed "+strcharinfo(0)+" -1"; Their speed will also change back to normal if they reconnected/character select.

Here's a sample script:
prontera,170,164,1    script    Max Pvp    726,{ // Change to your NPC set @MP_Level, 99 - BaseLevel; warp "prontera",0,0; // Change to your PVP map goto MP_Start; end; MP_Start: atcommand "#blevel "+strcharinfo(0)+" "+@MP_Level+""; end; OnPCLogoutEvent: OnPCDieEvent: // When they die or logout, it will revert their original level if (strcharinfo(3) == "prontera") { // Change to your PVP map atcommand "#blevel "+strcharinfo(0)+" -"+@MP_Level+""; end; } }

Let me rephrase the description on the Wiki.
 
On normal maps,
It will freeze monsters as well as guild or party members on the same party as you.
 
On PvP maps,
It will freeze everyone.
 
On GvG/WoE maps,
It will freeze all enemies, including your guild mates if you are on the same party.
So if you don't wanna freeze your guild mates, avoid being on the same party with them.

Are you using the latest one? If yes, that proves that the revision# from GIT is different than the SVN.
 
Thanks 15peaces!

Do not apply this diff/patch on your client:
Disable 1rag 1 type Parameters

Never knew that there's an option like that. I'm gonna try using option 1 and let you know.
 
It worked.
 
Thanks Emistry and Reigneil.

Problem Fix!
Thanks NeoMind.
 
As for the sake of others, I used NeoMind's NEMO Patcher and applied the patch that NeoMind mentioned.