diff --git a/LEGO1/lego/legoomni/include/legoanimationmanager.h b/LEGO1/lego/legoomni/include/legoanimationmanager.h
index 5022b74a..84d4fac4 100644
--- a/LEGO1/lego/legoomni/include/legoanimationmanager.h
+++ b/LEGO1/lego/legoomni/include/legoanimationmanager.h
@@ -78,11 +78,11 @@ class AnimState : public LegoState {
 	// AnimState::`scalar deleting destructor'
 
 private:
-	undefined4 m_unk0x08; // 0x08
-	undefined4 m_unk0x0c; // 0x0c
-	void* m_unk0x10;      // 0x10
-	undefined4 m_unk0x14; // 0x14
-	void* m_unk0x18;      // 0x18
+	undefined4 m_unk0x08;     // 0x08
+	undefined4 m_unk0x10_len; // 0x0c
+	undefined2* m_unk0x10;    // 0x10
+	undefined4 m_unk0x18_len; // 0x14
+	undefined* m_unk0x18;     // 0x18
 };
 
 // VTABLE: LEGO1 0x100d8c18
diff --git a/LEGO1/lego/legoomni/src/common/legoanimationmanager.cpp b/LEGO1/lego/legoomni/src/common/legoanimationmanager.cpp
index 2d85a646..a7a4a6a1 100644
--- a/LEGO1/lego/legoomni/src/common/legoanimationmanager.cpp
+++ b/LEGO1/lego/legoomni/src/common/legoanimationmanager.cpp
@@ -2826,9 +2826,9 @@ void LegoAnimationManager::FUN_10064b50(MxLong p_time)
 // FUNCTION: LEGO1 0x10064ff0
 AnimState::AnimState()
 {
-	m_unk0x0c = 0;
+	m_unk0x10_len = 0;
 	m_unk0x10 = NULL;
-	m_unk0x14 = 0;
+	m_unk0x18_len = 0;
 	m_unk0x18 = NULL;
 }
 
@@ -2850,11 +2850,66 @@ void AnimState::FUN_10065240(MxU32, AnimInfo*, MxU32)
 	// TODO
 }
 
-// STUB: LEGO1 0x100652d0
+// FUNCTION: LEGO1 0x100652d0
+// FUNCTION: BETA10 0x10046621
 MxResult AnimState::Serialize(LegoFile* p_file)
 {
-	// TODO
-	return LegoState::Serialize(p_file);
+	// These two are equivalent up to the order of some deallocation.
+	// Choose as needed to get 100 %.
+	// Option 1:
+	// LegoState::Serialize(p_file);
+	// Option 2:
+	if (p_file->IsWriteMode()) {
+		p_file->WriteString(ClassName());
+	}
+
+	if (p_file->IsReadMode()) {
+		Read(p_file, &m_unk0x08);
+
+		// m_unk0x10_len and m_unk0x10
+		if (m_unk0x10) {
+			delete[] m_unk0x10;
+		}
+		Read(p_file, &m_unk0x10_len);
+		if (m_unk0x10_len != 0) {
+			m_unk0x10 = new undefined2[m_unk0x10_len];
+		}
+		else {
+			m_unk0x10 = NULL;
+		}
+		for (int i = 0; i < m_unk0x10_len; i++) {
+			Read(p_file, &m_unk0x10[i]);
+		}
+
+		// m_unk0x18_len and m_unk0x18
+		// Note that here we read first and then free memory in contrast to above
+		Read(p_file, &m_unk0x18_len);
+		if (m_unk0x18) {
+			delete[] m_unk0x18;
+		}
+		if (m_unk0x18_len != 0) {
+			m_unk0x18 = new undefined[m_unk0x18_len];
+		}
+		else {
+			m_unk0x18 = NULL;
+		}
+		for (int j = 0; j < m_unk0x18_len; j++) {
+			Read(p_file, &m_unk0x18[j]);
+		}
+	}
+	else if (p_file->IsWriteMode()) {
+		Write(p_file, m_unk0x08);
+		Write(p_file, m_unk0x10_len);
+		for (int i = 0; i < m_unk0x10_len; i++) {
+			Write(p_file, m_unk0x10[i]);
+		}
+		Write(p_file, m_unk0x18_len);
+		for (int j = 0; j < m_unk0x18_len; j++) {
+			Write(p_file, m_unk0x18[j]);
+		}
+	}
+
+	return SUCCESS;
 }
 
 // STUB: LEGO1 0x100654f0