diff --git a/gts/pokemondpds.ashx.cs b/gts/pokemondpds.ashx.cs
index 796b436f..851f32fd 100644
--- a/gts/pokemondpds.ashx.cs
+++ b/gts/pokemondpds.ashx.cs
@@ -230,6 +230,16 @@ namespace PkmnFoundations.GTS
                     {
                         // hack check failed
                         SessionManager.Remove(session);
+
+                        // responses:
+                        // 0x00: Appears to start depositing? todo: test if this code leads to a normal deposit.
+                        // 0x01: successful deposit
+                        // 0x02-0x03: Communication error...
+                        // 0x04-0x06: bsod
+                        // 0x07: The GTS is very crowded now. Please try again later. (and it boots you!)
+                        // 0x08-0x0d: That Pokémon may not be offered for trade!
+                        // 0x0e: You were disconnected from the GTS. Returning to the reception counter.
+                        // 0x0f: Blue screen of death
                         response.Write(new byte[] { 0x0c, 0x00 }, 0, 2);
                         break;
                     }
@@ -361,6 +371,14 @@ namespace PkmnFoundations.GTS
                     {
                         // todo: find the correct codes for these
                         SessionManager.Remove(session);
+
+                        // responses:
+                        // 0x00-0x01: bsod
+                        // 0x02: Unfortunately, it was traded to another Trainer.
+                        // 0x03-0x07: bsod
+                        // 0x08-0x0d: That Pokémon may not be offered for trade!
+                        // 0x0e: You were disconnected from the GTS. Returning to the reception counter.
+                        // 0x0f: bsod
                         response.Write(new byte[] { 0x0c, 0x00 }, 0, 2);
                         return;
                     }
diff --git a/gts/src/AppStateHelper.cs b/gts/src/AppStateHelper.cs
index 8f86f94b..4f316e2c 100644
--- a/gts/src/AppStateHelper.cs
+++ b/gts/src/AppStateHelper.cs
@@ -8,6 +8,12 @@ namespace PkmnFoundations.GTS
 {
     public static class AppStateHelper
     {
+        /// <summary>
+        /// Gets the Pokédex stored in Application State or else instances a
+        /// new one from the default database.
+        /// </summary>
+        /// <param name="application">App State reference for this request</param>
+        /// <returns>Pokédex</returns>
         public static Pokedex.Pokedex Pokedex(HttpApplicationState application)
         {
             return GetTypedApplicationObject(application, "pkmncfPokedex", () => new Pokedex.Pokedex(Database.Instance, false));
diff --git a/gts/syachi2ds.ashx.cs b/gts/syachi2ds.ashx.cs
index 7e014ea8..152f3d2b 100644
--- a/gts/syachi2ds.ashx.cs
+++ b/gts/syachi2ds.ashx.cs
@@ -225,8 +225,23 @@ namespace PkmnFoundations.GTS
                     if (!record.Validate(false))
                     {
                         // hack check failed
-                        // todo: test that 0c 00 is the correct code for GenV
                         SessionManager.Remove(session);
+
+                        // responses:
+                        // 0x00: bsod
+                        // 0x01: successful deposit
+                        // 0x02: Communication error 13265
+                        // 0x03: Communication error 13264
+                        // 0x04-0x06: bsod
+                        // 0x07: The GTS is very crowded now. Please try again later (13261). (and it boots you)
+                        // 0x08: That Pokémon may not be offered for trade (13268)!
+                        // 0x09: That Pokémon may not be offered for trade (13269)!
+                        // 0x0a: That Pokémon may not be offered for trade (13270)!
+                        // 0x0b: That Pokémon may not be offered for trade (13271)!
+                        // 0x0c: That Pokémon may not be offered for trade (13266)!
+                        // 0x0d: That Pokémon may not be offered for trade (13267)!
+                        // 0x0e: You were disconnected from the GTS. Error code: 13262 (and it boots you)
+                        // 0x0f: bsod
                         response.Write(new byte[] { 0x0c, 0x00 }, 0, 2);
                         break;
                     }
@@ -360,6 +375,19 @@ namespace PkmnFoundations.GTS
                     {
                         // todo: find the correct codes for these
                         SessionManager.Remove(session);
+
+                        // responses:
+                        // 0x00-0x01: bsod
+                        // 0x02: Unfortunately, it was traded to another Trainer.
+                        // 0x03-0x07: bsod
+                        // 0x08: That Pokémon may not be offered for trade (13268)!
+                        // 0x09: That Pokémon may not be offered for trade (13269)!
+                        // 0x0a: That Pokémon may not be offered for trade (13270)!
+                        // 0x0b: That Pokémon may not be offered for trade (13271)!
+                        // 0x0c: That Pokémon may not be offered for trade (13266)!
+                        // 0x0d: That Pokémon may not be offered for trade (13267)!
+                        // 0x0e: You were disconnected from the GTS. Error code: 13262
+                        // 0x0f: bsod
                         response.Write(new byte[] { 0x0c, 0x00 }, 0, 2);
                         return;
                     }