diff --git a/SVSim.BattleNode/Protocol/Bodies/AlivePushBody.cs b/SVSim.BattleNode/Protocol/Bodies/AlivePushBody.cs
new file mode 100644
index 0000000..5ebafbf
--- /dev/null
+++ b/SVSim.BattleNode/Protocol/Bodies/AlivePushBody.cs
@@ -0,0 +1,7 @@
+using System.Text.Json.Serialization;
+
+namespace SVSim.BattleNode.Protocol.Bodies;
+
+public sealed record AlivePushBody(
+    [property: JsonPropertyName("scs")] string Scs,
+    [property: JsonPropertyName("ocs")] string Ocs) : IMsgBody;
diff --git a/SVSim.BattleNode/Protocol/Bodies/BattleFinishBody.cs b/SVSim.BattleNode/Protocol/Bodies/BattleFinishBody.cs
new file mode 100644
index 0000000..3ac3c47
--- /dev/null
+++ b/SVSim.BattleNode/Protocol/Bodies/BattleFinishBody.cs
@@ -0,0 +1,7 @@
+using System.Text.Json.Serialization;
+
+namespace SVSim.BattleNode.Protocol.Bodies;
+
+public sealed record BattleFinishBody(
+    [property: JsonPropertyName("result")] int Result,
+    [property: JsonPropertyName("resultCode")] int ResultCode = 1) : IMsgBody;
diff --git a/SVSim.BattleNode/Protocol/Bodies/OpponentTurnStartBody.cs b/SVSim.BattleNode/Protocol/Bodies/OpponentTurnStartBody.cs
new file mode 100644
index 0000000..e397348
--- /dev/null
+++ b/SVSim.BattleNode/Protocol/Bodies/OpponentTurnStartBody.cs
@@ -0,0 +1,7 @@
+using System.Text.Json.Serialization;
+
+namespace SVSim.BattleNode.Protocol.Bodies;
+
+public sealed record OpponentTurnStartBody(
+    [property: JsonPropertyName("spin")] int Spin,
+    [property: JsonPropertyName("resultCode")] int ResultCode = 1) : IMsgBody;
diff --git a/SVSim.BattleNode/Protocol/Bodies/ResultCodeOnlyBody.cs b/SVSim.BattleNode/Protocol/Bodies/ResultCodeOnlyBody.cs
new file mode 100644
index 0000000..11057e2
--- /dev/null
+++ b/SVSim.BattleNode/Protocol/Bodies/ResultCodeOnlyBody.cs
@@ -0,0 +1,6 @@
+using System.Text.Json.Serialization;
+
+namespace SVSim.BattleNode.Protocol.Bodies;
+
+public sealed record ResultCodeOnlyBody(
+    [property: JsonPropertyName("resultCode")] int ResultCode = 1) : IMsgBody;
diff --git a/SVSim.UnitTests/BattleNode/Protocol/Bodies/SmallBodiesTests.cs b/SVSim.UnitTests/BattleNode/Protocol/Bodies/SmallBodiesTests.cs
new file mode 100644
index 0000000..a76f1eb
--- /dev/null
+++ b/SVSim.UnitTests/BattleNode/Protocol/Bodies/SmallBodiesTests.cs
@@ -0,0 +1,55 @@
+using System.Text.Json;
+using System.Text.Json.Nodes;
+using NUnit.Framework;
+using SVSim.BattleNode.Protocol.Bodies;
+
+namespace SVSim.UnitTests.BattleNode.Protocol.Bodies;
+
+[TestFixture]
+public class SmallBodiesTests
+{
+    [Test]
+    public void OpponentTurnStartBody_SerializesSpin_AndDefaultsResultCodeToOne()
+    {
+        var body = new OpponentTurnStartBody(Spin: 100);
+
+        var node = (JsonObject)JsonSerializer.SerializeToNode(body)!;
+
+        Assert.That(node["spin"]!.GetValue<int>(), Is.EqualTo(100));
+        Assert.That(node["resultCode"]!.GetValue<int>(), Is.EqualTo(1));
+    }
+
+    [Test]
+    public void ResultCodeOnlyBody_SerializesJustResultCode()
+    {
+        var body = new ResultCodeOnlyBody();
+
+        var node = (JsonObject)JsonSerializer.SerializeToNode(body)!;
+
+        Assert.That(node.Count, Is.EqualTo(1));
+        Assert.That(node["resultCode"]!.GetValue<int>(), Is.EqualTo(1));
+    }
+
+    [Test]
+    public void BattleFinishBody_SerializesResultAndResultCode()
+    {
+        var body = new BattleFinishBody(Result: 1);
+
+        var node = (JsonObject)JsonSerializer.SerializeToNode(body)!;
+
+        Assert.That(node["result"]!.GetValue<int>(), Is.EqualTo(1));
+        Assert.That(node["resultCode"]!.GetValue<int>(), Is.EqualTo(1));
+    }
+
+    [Test]
+    public void AlivePushBody_SerializesScsAndOcs_AndDoesNotIncludeResultCode()
+    {
+        var body = new AlivePushBody(Scs: "ONLINE", Ocs: "ONLINE");
+
+        var node = (JsonObject)JsonSerializer.SerializeToNode(body)!;
+
+        Assert.That(node["scs"]!.GetValue<string>(), Is.EqualTo("ONLINE"));
+        Assert.That(node["ocs"]!.GetValue<string>(), Is.EqualTo("ONLINE"));
+        Assert.That(node.ContainsKey("resultCode"), Is.False);
+    }
+}