diff --git a/configure.py b/configure.py
index ce879650..57a032bb 100644
--- a/configure.py
+++ b/configure.py
@@ -1254,7 +1254,7 @@ config.libs = [
             Object(Matching, "effect/ef_flash.c"),
             Object(Matching, "effect/ef_footprint.c"),
             Object(Matching, "effect/ef_furo_yuge.c"),
-            Object(NonMatching, "effect/ef_gimonhu.c"),
+            Object(Matching, "effect/ef_gimonhu.c"),
             Object(NonMatching, "effect/ef_goki.c"),
             Object(NonMatching, "effect/ef_ha.c"),
             Object(Matching, "effect/ef_halloween.c"),
diff --git a/src/effect/ef_gimonhu.c b/src/effect/ef_gimonhu.c
index 514db582..da8ecb56 100644
--- a/src/effect/ef_gimonhu.c
+++ b/src/effect/ef_gimonhu.c
@@ -1,12 +1,19 @@
 #include "ef_effect_control.h"
+#include "m_common_data.h"
+#include "m_rcp.h"
+#include "sys_matrix.h"
 
 static void eGM_init(xyz_t pos, int prio, s16 angle, GAME* game, u16 item_name, s16 arg0, s16 arg1);
 static void eGM_ct(eEC_Effect_c* effect, GAME* game, void* ct_arg);
 static void eGM_mv(eEC_Effect_c* effect, GAME* game);
 static void eGM_dw(eEC_Effect_c* effect, GAME* game);
 
+#define EFFECT_LIFETIME 72
+#define EFFECT_STAGE2 64
+#define EFFECT_STAGE1 50
+
+// clang-format off
 eEC_PROFILE_c iam_ef_gimonhu = {
-    // clang-format off
     &eGM_init,
     &eGM_ct,
     &eGM_mv,
@@ -14,21 +21,78 @@ eEC_PROFILE_c iam_ef_gimonhu = {
     eEC_IGNORE_DEATH,
     eEC_NO_CHILD_ID,
     eEC_DEFAULT_DEATH_DIST,
-    // clang-format on
 };
 
+f32 eGM_scale_data[][2] = { 
+    { 0.5f, 0.5f },
+    { 0.5f, 1.2f },
+    { 0.5f, 2.f },
+    { 1.2f, 1.4f },
+    { 2.f, 0.7f },
+    { 1.5f, 0.8f },
+    { 1.f, 1.f },
+    { 1.f, 1.f },
+    { 1.f, 1.f },
+    { 1.f, 1.f },
+    { 1.f, 1.f },
+    { 1.f, 1.f },
+    { 1.f, 1.f },
+    { 1.f, 1.f },
+    { 1.f, 1.f },
+    { 1.f, 1.f },
+    { 1.f, 1.f },
+    { 1.f, 1.f },
+    { 1.f, 1.f },
+    { 1.f, 1.f },
+    { 1.f, 1.f },
+    { 1.f, 1.f },
+    { 1.f, 1.f },
+    { 1.f, 1.f },
+    { 1.f, 1.f },
+    { 1.f, 1.f }
+};
+
+extern Gfx ef_gimonhu01_00_modelT[];
+
+// clang-format on
 static void eGM_init(xyz_t pos, int prio, s16 angle, GAME* game, u16 item_name, s16 arg0, s16 arg1) {
-    // TODO
+    const float delta = 9.58738e-05f; // not sure about this constant, close to 1e-4, but not quite
+    xyz_t p = { 0.f, 15.f, 7.f };
+    sMath_RotateY(&p, angle * delta);
+    pos.x += p.x;
+    pos.y += p.y;
+    eEC_CLIP->make_effect_proc(eEC_EFFECT_GIMONHU, pos, NULL, game, NULL, item_name, prio, 0, 0);
 }
 
 static void eGM_ct(eEC_Effect_c* effect, GAME* game, void* ct_arg) {
-    // TODO
+    effect->timer = EFFECT_LIFETIME;
+    effect->offset.x = effect->offset.y = effect->offset.z = 0.f;
 }
 
 static void eGM_mv(eEC_Effect_c* effect, GAME* game) {
-    // TODO
+    s16 currentFrame = EFFECT_LIFETIME - effect->timer;
+    if (currentFrame == 0) {
+        sAdo_OngenTrgStart(0X2F, &effect->position);
+    }
 }
 
 static void eGM_dw(eEC_Effect_c* effect, GAME* game) {
-    // TODO
+    s16 frameIndex;
+    s16 currentFrame = EFFECT_LIFETIME - effect->timer;
+    int v = (u8)eEC_CLIP->calc_adjust_proc(currentFrame, EFFECT_STAGE2, EFFECT_LIFETIME, 255.f, 0.f);
+    if (currentFrame > EFFECT_STAGE1) {
+        currentFrame = EFFECT_STAGE1;
+    }
+    frameIndex = currentFrame >> 1;
+    frameIndex = CLAMP(frameIndex, 0, EFFECT_STAGE1 / 2);
+    effect->scale.x = eGM_scale_data[frameIndex][0] * 0.008f;
+    effect->scale.y = eGM_scale_data[frameIndex][1] * 0.008f;
+    effect->scale.z = 0.008f;
+    OPEN_DISP(game->graph);
+    _texture_z_light_fog_prim_xlu(game->graph);
+    eEC_CLIP->auto_matrix_xlu_offset_proc(game, &effect->position, &effect->scale, &effect->offset);
+    gSPMatrix(NEXT_POLY_XLU_DISP, _Matrix_to_Mtx_new(game->graph), G_MTX_NOPUSH | G_MTX_LOAD | G_MTX_MODELVIEW);
+    gDPSetPrimColor(NEXT_POLY_XLU_DISP, 0, 128, 255, 255, 255, v);
+    gSPDisplayList(NEXT_POLY_XLU_DISP, ef_gimonhu01_00_modelT);
+    CLOSE_DISP(game->graph);
 }