diff --git a/.gitignore b/.gitignore
index 9bc17b380..460106770 100644
--- a/.gitignore
+++ b/.gitignore
@@ -37,3 +37,6 @@ compile_commands.json
 /*.txt
 *.exe
 tools/mwcc_compiler
+
+# Apple
+.DS_Store
diff --git a/include/Enemy/BossWanwan.hpp b/include/Enemy/BossWanwan.hpp
index 7bd1f1d4b..8dfd6621c 100644
--- a/include/Enemy/BossWanwan.hpp
+++ b/include/Enemy/BossWanwan.hpp
@@ -2,8 +2,113 @@
 #define ENEMY_BOSS_WANWAN_HPP
 
 #include <Strategic/Nerve.hpp>
+#include <Strategic/Spine.hpp>
+#include <Strategic/LiveManager.hpp>
+#include <Strategic/Binder.hpp>
+#include <Enemy/EnemyManager.hpp>
+#include <Enemy/Enemy.hpp>
 
 class TLiveActor;
+class TBossWanwan;
+
+class TBWHit : public THitActor {
+public:
+	TBWHit(TBossWanwan* owner, int joint_index,
+	       const char* name = "idk"); // yeah
+
+	virtual void perform(u32 cue, JDrama::TGraphics* graphics);
+	virtual BOOL receiveMessage(THitActor* sender, u32 message);
+
+private:
+	TBossWanwan* mOwner;
+	u32 mJointIndex;
+};
+
+class TBWPicket : public THitActor {
+public:
+	virtual void perform(u32 cue, JDrama::TGraphics* graphics);
+	virtual BOOL receiveMessage(THitActor* sender, u32 message);
+};
+
+class TBWBinder : public TBinder {
+public:
+	TBWBinder();
+	virtual void bind(TLiveActor*);
+};
+
+class TBWLeash : public THitActor {
+public:
+	TBWLeash(int, const char*);
+
+	virtual void perform(u32 cue, JDrama::TGraphics* graphics);
+};
+
+class TBWLeashNode : public THitActor {
+public:
+	TBWLeashNode(int, const char*);
+
+	virtual void perform(u32 cue, JDrama::TGraphics* graphics);
+	virtual void calcMatrix();
+	virtual void calcTemperature();
+};
+
+class TBWParams : public TSpineEnemyParams {
+public:
+	/* * TSpineEnemyParams ends at 0xA8. *
+	 * Every TParamRT<T> occupies 0x14 bytes:
+	 * * +0x00 : TParam / base data
+	 * * +0x04 : ...
+	 * * +0x0C : ...
+	 * * +0x10 : actual parameter value
+	 * * * Therefore: * parameter start = X * parameter value = X + 0x10 */
+	TBWParams(const char*);
+
+	/* 0x0A8 */ TParamRT<f32> mSLMarchSpeed;
+	/* 0x0BC */ TParamRT<f32> mSLTurnSpeed;
+	/* 0x0D0 */ TParamRT<f32> mSLLeashNodeLen;
+	/* 0x0E4 */ TParamRT<f32> mSLPicketHeight;
+	/* 0x0F8 */ TParamRT<f32> mSLPicketRadius;
+	/* 0x10C */ TParamRT<f32> mSLChainHitHeight;
+	/* 0x120 */ TParamRT<f32> mSLChainHitRadius;
+	/* 0x134 */ TParamRT<f32> mSLChainGroundRadius;
+	/* 0x148 */ TParamRT<f32> mSLPullLimit;
+	/* 0x15C */ TParamRT<f32> mSLAttackSpeed;
+	/* 0x170 */ TParamRT<s32> mSLStunTimer;
+	/* 0x184 */ TParamRT<f32> mSLSearchLength;
+	/* 0x198 */ TParamRT<f32> mSLSearchAngle;
+	/* 0x1AC */ TParamRT<u8> mSLBWHitPointMax;
+	/* 0x1C0 */ TParamRT<f32> mSLHeadGap;
+	/* 0x1D4 */ TParamRT<f32> mSLShakeLengthMax;
+	/* 0x1E8 */ TParamRT<f32> mSLShakeLengthMaxHP0;
+};
+
+// TBossWanwan size: 0x1b8
+class TBossWanwan : public TSpineEnemy {
+public:
+	TBossWanwan(const char* name = "ボスワンワン");
+
+	virtual void kill();
+	virtual void init(TLiveManager*);
+	BOOL receiveMessage(THitActor* sender, u32 message);
+	virtual void shakeCamera(int shakeType);
+
+private:
+	/* 0x1A0 */ BOOL unk0;
+	/* 0x1A8 */ u32 mWaterHitCount;
+	/* 0x1AC */ u32 mDistToMarioSquared;
+	/* 0x1B0 */ TBWParams* mParams;
+	/* 0x18C */ u8 msInvincible;
+};
+
+class TBossWanwanManager : public TEnemyManager {
+public:
+	TBossWanwanManager(const char* name = "ボスワンワンマネージャ");
+
+	virtual void load(JSUMemoryInputStream&);
+
+	TSpineEnemy* createEnemyInstance();
+	void createModelData();
+};
 
 DECLARE_NERVE(TNerveBWGraphWander, TLiveActor);
 DECLARE_NERVE(TNerveBWRoll, TLiveActor);
diff --git a/include/System/Particles.hpp b/include/System/Particles.hpp
index 9629ff185..c7ee07aac 100644
--- a/include/System/Particles.hpp
+++ b/include/System/Particles.hpp
@@ -144,6 +144,7 @@ enum E_SMS_EFFECT_ONETIME_NORMAL /* 0 */ {
 	PARTICLE_MS_POPO_BOMB_B           = 0xA2,
 	GATEKEEPER_JPA_MS_GKPA_DEAD       = 0xA7,
 	GATEKEEPER_JPA_MS_GKPA_DEADSMOKE  = 0xA8,
+	BWAN_JPA_MS_DOWNYUGE              = 0xB0,
 	PARTICLE_MS_SMB_AP_ROCK           = 0xB6,
 	PARTICLE_MS_SMB_AP_SMOKE          = 0xB7,
 	PARTICLE_MS_GESO_OSENHIT_A        = 0xBC,
diff --git a/src/Enemy/bosswanwan.cpp b/src/Enemy/bosswanwan.cpp
index 8b1378917..e9514c1f7 100644
--- a/src/Enemy/bosswanwan.cpp
+++ b/src/Enemy/bosswanwan.cpp
@@ -1 +1,130 @@
+#include <MSound/MSSetSound.hpp>
+#include <MSound/MSoundBGM.hpp>
+#include <MSound/MSound.hpp>
+#include <MSound/MSoundSE.hpp>
+#include <MSound/SoundEffects.hpp>
+#include <M3DUtil/InfectiousStrings.hpp>
+#include <Enemy/BossWanwan.hpp>
+#include <Camera/CameraShake.hpp>
+#include <MarioUtil/RumbleMgr.hpp>
+#include <MarioUtil/MathUtil.hpp>
+#include <MarioUtil/RandomUtil.hpp>
+#include <Player/MarioAccess.hpp>
+#include <M3DUtil/MActor.hpp>
+#include <M3DUtil/MActorAnm.hpp>
+#include <Strategic/ObjManager.hpp>
+#include <Player/ModelWaterManager.hpp>
+#include <System/FlagManager.hpp>
+#include <System/MarDirector.hpp>
+#include <System/EmitterViewObj.hpp>
+#include <System/Application.hpp>
+#include <System/Particles.hpp>
+#include <JSystem/JGeometry/JGUtil.hpp>
 
+void TBossWanwan::kill() { return; }
+
+BOOL TBossWanwan::receiveMessage(THitActor* sender, u32 message)
+{
+	u32 actorType = sender->getActorType();
+	if (actorType == 0x80000001) {
+		return false;
+	} else if (actorType == 0x1000001) {
+		// fabricated
+		if (!this->msInvincible) {
+			gpMarioParticleManager->emit(PARTICLE_MS_ENM_WATHIT,
+			                             &sender->mPosition, 0, 0);
+			if (this->mHitPoints == 0) {
+
+				SMSGetMSound()->startSoundActor(0x28d1, &this->mPosition, 0,
+				                                nullptr, 0, 4);
+			} else if (this->mHitPoints == 1) {
+				MtxPtr iVar3 = this->getModel()->getAnmMtx(1);
+				gpMarioParticleManager->emitAndBindToMtxPtr(
+				    0xb0, (iVar3 + 0x58) + 0x30, 0, 0);
+				SMSGetMSound()->startSoundActor(0x28c5, &this->mPosition, 0,
+				                                nullptr, 0, 4);
+
+			} else {
+				SMSGetMSound()->startSoundActor(0x28be, &this->mPosition, 0,
+				                                nullptr, 0, 4);
+			}
+
+			if (this->mHitPoints != 0) {
+				this->mHitPoints--;
+			}
+
+			this->mWaterHitCount++;
+			return true;
+		} else {
+			return true;
+		}
+
+	} else {
+		if (actorType == 0x4000005a) {
+			sender->receiveMessage(this, HIT_MESSAGE_HIP_DROP);
+			this->mHitPoints = 0;
+			this->mWaterHitCount++;
+			if (!this->unk0) {
+				this->unk0 = true;
+			}
+
+			MtxPtr mtx = this->getModel()->getAnmMtx(1);
+			gpMarioParticleManager->emitAndBindToMtxPtr(BWAN_JPA_MS_DOWNYUGE,
+			                                            mtx, 0, nullptr);
+
+			SMSGetMSound()->startSoundActor(0x28c5, &this->mPosition, 0,
+			                                nullptr, 0, 4);
+		}
+	}
+
+	return TSpineEnemy::receiveMessage(sender, message);
+}
+
+void TBossWanwan::shakeCamera(int shakeType)
+{
+	if (!SMS_IsMarioTouchGround4cm()) {
+		return;
+	}
+
+	f32 dist = this->mDistToMarioSquared;
+
+	dist = MsSqrtf(dist);
+
+	TBWParams* params  = (TBWParams*)this->getSaveParam();
+	f32 shakeLengthMax = params->mSLShakeLengthMax.get();
+
+	TBWParams* params2    = (TBWParams*)this->getSaveParam();
+	f32 shakeLengthMaxHP0 = params2->mSLShakeLengthMaxHP0.get();
+
+	f32 ratio = 1.0;
+	if (this->mMActor->checkCurBckFromIndex(0) == 0) {
+		TBWParams* params3 = (TBWParams*)this->getSaveParam();
+		ratio = (f32)this->mHitPoints / (f32)params3->mSLBWHitPointMax.get();
+	}
+
+	f32 effectiveDist
+	    = shakeLengthMax * ratio + shakeLengthMaxHP0 * (1.0f - ratio);
+
+	f32 delta = effectiveDist - dist;
+
+	if (delta < 0.0f) {
+		return;
+	}
+
+	f32 power = delta / effectiveDist;
+	if (1.0f < power) {
+		power = 1.0f;
+	}
+
+	power *= ratio;
+
+	gpCameraShake->startShake((EnumCamShakeMode)shakeType, power);
+	SMSRumbleMgr->start(8, &this->mPosition);
+}
+
+TSpineEnemy* TBossWanwanManager::createEnemyInstance()
+{
+	return new TBossWanwan();
+}
+
+void TBossWanwanManager::createModelData() { }