sader1992

at the start
if(Class == 4218) end;  

try @reloadnpc
the npc already loaded , you can't load it twice
@reloadnpc
or @unloadnpcfile
than
@loadnpc
 
also , did you edit the npc file ?
the npc is depend on the duplicate if you didn't edit it
why not adding it to your conf file and @reload script , so it would be always loaded ?

- script respawnMvp -1,{ OnInit: setarray .mob_id[0],1857,1002,1031,1113,1613,1836; .monster = .mob_id[rand(getarraysize(.mob_id))]; monster "prontera",154,172,"--en--", .monster, 1, "respawnMvp::OnKill"; announce "MVP "+getmonsterinfo(.monster, 0)+" has spawned!",0; end; OnKill: announce getmonsterinfo(.monster, 0)+ " was killed by "+strcharinfo(0)+".",0; .monster = .mob_id[rand(getarraysize(.mob_id))]; monster "prontera",154,172,"--en--", .monster, 1, "respawnMvp::OnKill"; announce "MVP "+getmonsterinfo(.monster, 0)+" has spawned!",0; end; }  

just before you delete the zeny
set Zeny, Zeny-.s_zeny; add
if(!countitem(7716)){ mes "you need 1 " + getitemname(7716) + " to complete the enchantment."; end; } delitem 7716,1;  

it look for me in the video your script all about chances , so i am not sure what you are asking about
its as simple as
if(rand(1,100) < 76){ //75% chance (the result is between and includes 1 and 75) }else{ //25% chance (the result is else) }  

it's not recommended . but you can use this command
*classchange(<view id>{,"<NPC name>","<flag>"});
read the command info to know why it's not recommended
also you will need to do a lot of extra code to keep your npc the way you want the player to see (read the command information)
--------------------------------------- *classchange(<view id>{,"<NPC name>","<flag>"}); This command is very ancient, its origins are clouded in mystery. It will send a 'display id change' packet to everyone in the immediate area of the NPC object, which will supposedly make the NPC look like a different sprite, an NPC sprite ID, or a monster ID. This effect is not stored anywhere and will not persist (Which is odd, cause it would be relatively easy to make it do so) and most importantly, will not work at all since this command was broken with the introduction of advanced classes. The code is written with the assumption that the lowest sprite IDs are the job sprites and the anything beyond them is monster and NPC sprites, but since the advanced classes rolled in, they got the ID numbers on the other end of the number pool where monster sprites float. As a result it is currently impossible to call this command with a valid view id. It will do nothing whatsoever if the view ID is below 4047. Getting it to run will actually just crash the client. It could be a real gem if it can be gotten to actually do what it's supposed to do, but this will only happen in a later SVN revision. Empty <NPC name> means attached NPC. Target for <flag>: - bc_area : Sprite is sent to players in the vicinity of the source (default value). - bc_self : Sprite is sent only to player attached. ---------------------------------------  

you don't need to define the variable before you use it, any new variable you use by default is int 0 string ""
so you can right away
if(#var < 11){
//your code
#var++;
}

https://github.com/rathena/rathena/blob/7f772c32d3be201861946bb64720c231828465ac/doc/script_commands.txt#L6456
 
--------------------------------------- *hideonnpc "<NPC object name>"; *hideoffnpc "<NPC object name>"; These commands will make the NPC object specified display as hidden/visible, even though not actually disabled per se. Hidden as in thief Hide skill, but unfortunately, not detectable by Ruwach or Sight. As they are now, these commands are pointless, it is suggested to use 'disablenpc'/'enablenpc', because these two commands actually unload the NPC sprite location and other accompanying data from memory when it is not used. However, you can use these for some quest ideas (such as cloaking NPCs talking while hidden then revealing.... you can wonder around =P ---------------------------------------  

https://github.com/rathena/rathena/commit/3e0d3d2fe6b244099d3987b7a21260d6b070512e

you are asking a lot of questions
i couldn't understand most of it
i think you want to know how to add Custom NPC?
this a short guide < do it and everything would work:
SERVER_FILES: >src >>map >>npc.hpp EXAMPLE: JT_NPC_CUSTOM = 30000, >>script_constants.hpp EXAMPLE: export_constant_npc(JT_NPC_CUSTOM); CLIENT_FILES: >data >>sprite >>>npc >>>> //your npc spr/act here EXAMPLE: >>>>npc_test.act >>>>npc_test.spr >>luafiles514 >>>lua files >>>>datainfo >>>>>npcidentity.lub EXAMPLE: JT_NPC_CUSTOM = 30000, (THE ID MOST NOT BE ALREADY USED IN jobidentity.lub AND npcidentity.lub / THE ID MUST BE THE SAME AS THE SERVER npc.hpp) >>>>>jobname.lub EXAMPLE: [jobtbl.JT_NPC_CUSTOM] = "npc_test", recompile your server
do not use already used IDS/NAMES
"JT_" is important
make sure the client read the files you edited first!!!! <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< READ THIS
run your server
now you can add the script in your server
prontera,150,150,0 script my_costum_npc 30000,{} OR prontera,150,150,0 script my_costum_npc JT_NPC_CUSTOM,{} reloadscript and you will see your npc

you need to give the group you want the permission to use it
https://github.com/rathena/rathena/blob/ce1508a01c68dee80544242b470987742f3b3ece/conf/groups.conf#L96
attendance: true  

well if there is a bug you can report it in rathena's github
also you can use npc shop to use cash shop and disable the cash shop
check it out
https://github.com/rathena/rathena/blob/ce1508a01c68dee80544242b470987742f3b3ece/doc/script_commands.txt#L283

if(vip_status(VIP_STATUS_ACTIVE)){ //vip buffs here }  

the script you give , is not a complete script so i can't give more detail than
--------------------------------------- *mobcount("<map name>","<event label>") This function will count all the monsters on the specified map that have a given event label and return the number or 0 if it can't find any. Naturally, only monsters spawned with 'monster' and 'areamonster' script commands can have non-empty event label. If you pass this function an empty string for the event label, it will return the total count of monster without event label, including permanently spawning monsters. With the dynamic mobs system enabled, where mobs are not kept in memory for maps with no actual people playing on them, this will return a 0 for any such map. If the event label is given as "all", all monsters will be counted, regardless of having any event label attached. If the map name is given as "this", the map the invoking character is on will be used. If the map is not found, or the invoker is not a character while the map is "this", it will return -1. --------------------------------------- just at the start of the npc that spawn the monsters put
if(mobcount("ars_fild58","EP7_abysses::OnBossDead")) end; or maybe OnBossDead2 , you have 2 labels in the script ,and i don't know what monster you mean.

invek,150,164,3 script MvP 527,{ mes "1. Doppelganger (gef_dun02) = "+( ( mobcount( "aev_fild01","MvP::OnKilledsilver") == 0) ? "^ff0000DEAD^000000" : "^008000ALIVE^000000" ) +""; close; OnInit: initnpctimer; stopnpctimer; monster "aev_fild01",0,0,"Doppelganger",1046,1,"MvP::OnKilledsilver"; end; OnKilledsilver: setnpctimer 0; startnpctimer; end; OnTimer1800000: announce "Doppel is now alive",0; monster "aev_fild01",0,0,"Doppelganger",1046,1,"MvP::OnKilledsilver"; stopnpctimer; end; }  

@command it self shows the custom commands
type @command
see the last commands you will see "script commands"
and than you will see all the commands made by scripts
ofc you can do this too
- script ccommand -1,{ OnAtcommand: dispbottom "@segurity - This command is used to protect your account and items."; dispbottom "@pvproom - This command is used to enter from anywhere in the pvp room."; dispbottom "more commands"; end; OnInit: bindatcmd "ccommand",strnpcinfo(3)+"::OnAtcommand"; end; }  

the item itself
bAddEle -> bMagicAddEle
the combo , look at
bMdef,.@r*; << wrong

if you ate using 2018 clients , you should add the quest in OngoingQuestInfoList.lub file not questid2display.txt

to disable the "effect" , you need to delete it script
to disable the "drop" you need to remove it from the monster database
removing the item from item database is not valid thing to do , you will get a lot of errors > it will remove the items from the server but you get errors in exchange

your reply does not add the information we asked for ? , atall
the code you put is 8cells and the image is 4cells ?
 
anyway I can sense your problem from the image
add this line after OnInit:
setbattleflag "min_npc_vendchat_distance", 0;  
also if you did read the error message you get in the chat and add it to the post from the start you would got faster answer

follow /doc/item_group.txt

https://github.com/rathena/rathena/pull/3548

prontera,155,155,5 script Cornfarmer 4_CORN,{ if (BaseJob == Job_Gunslinger) { if (CORNCOOLDOWN > gettimetick(2)){ mes "you need to wait 1 hour to get one more corn"; close; } getitem 26001,1; CORNCOOLDOWN = gettimetick(2) + 3600; //3600 seconds! = 1 hour mes "you got a corn!"; close; }//gs only mes "corn only for gunslingers sorry"; close; }  

set .@killedvar,getvar(EnableGod,getcharid(0,rid2name(killedrid))); if(.@killedvar == 1 && EnableGod == 1){ PvPkills++; dispbottom "You have won points."; dispbottom "God Point(s): "+PvPkills+"."; }  

pc.hpp
#define MAX_SKILL_TREE 85
 
also a fast way to do it
create new group id
give it all_skill: true permission
add the group id to OnPCLoginEvent for the job id or at the job changer (or any kind of script)
you will find all the skills in the etc window