Figured out a lot of the 19X and 1AX packets. Adding test packet data used in experiments.

FFXIVClassic Map Server/packets/send/player/SetChocoboNamePacket.cs

@@ -0,0 +1,22 @@
+using FFXIVClassic_Lobby_Server.packets;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace FFXIVClassic_Map_Server.packets.send.player
+{
+    class SetChocoboNamePacket
+    {
+        public const ushort OPCODE = 0x0198;
+        public const uint PACKET_SIZE = 0x40;
+
+        public static SubPacket buildPacket(uint playerActorID, uint targetActorID, string name)
+        {
+            if (Encoding.Unicode.GetByteCount(name) >= 0x20)
+                name = "ERR: Too Long";
+            return new SubPacket(OPCODE, playerActorID, targetActorID, Encoding.Unicode.GetBytes(name));
+        }
+    }
+}