{
        SendClientMessage(playerid, RED, "You have been kicked as you are using an incorrect name format. Use Firstname_Lastname.");
        Kick(playerid);
    }

SetTimerEx("KickPlayer", 100, false, "i", playerid);
and in function KickPlayer you put your Kick(playerid);

/* This is the timer that kicks the player if needed put it in your function so replace with Kick();*/
SetTimerEx("KickPlayer", 100, false, "i", playerid);

forward KickPlayer(playerid);
public KickPlayer(playerid) {
    Kick(playerid);
    return 1;
}

forward KickPublic(playerid);
public KickPublic(playerid) { Kick(playerid); }
 
stock KickWithMessage(playerid, color, message[])
{
    SendClientMessage(playerid, color, message);
    SetTimerEx("KickPublic", 1000, 0, "d", playerid);   //Delay of 1 second before kicking the player so he recieves the message
}
 
public OnPlayerCommandText(playerid, cmdtext[])
{
    if(strcmp(cmdtext, "/kickme", true) == 0)
    {
        //Kicks the player who the executed this command
        KickWithMessage(playerid, 0xFF0000FF, "You have been kicked.");
        return 1;
    }
    return 0;
}
//by Kye