diff --git a/src/libultra/rmon/xlitob.c b/src/libultra/rmon/xlitob.c
index 808fb217..b602b1b6 100644
--- a/src/libultra/rmon/xlitob.c
+++ b/src/libultra/rmon/xlitob.c
@@ -1,3 +1,93 @@
-#include "common.h"
+#include "global.h"
+#include "libc/string.h"
 
-#pragma GLOBAL_ASM("asm/us/nonmatchings/libultra/rmon/xlitob/_Litob.s")
+typedef struct {
+    /* 0x0 */ long long quot;
+    /* 0x8 */ long long rem;
+} lldiv_t;
+
+typedef struct {
+    /* 0x0 */ union {
+        /* 0x0 */ s64 ll;
+        /* 0x0 */ f64 ld;
+    } v;
+    /* 0x8 */ char* s;
+    /* 0xC */ s32 n0;
+    /* 0x10 */ s32 nz0;
+    /* 0x14 */ s32 n1;
+    /* 0x18 */ s32 nz1;
+    /* 0x1C */ s32 n2;
+    /* 0x20 */ s32 nz2;
+    /* 0x24 */ s32 prec;
+    /* 0x28 */ s32 width;
+    /* 0x2C */ size_t nchar;
+    /* 0x30 */ u32 flags;
+    /* 0x34 */ u8 qual;
+} _Pft;
+
+lldiv_t lldiv(long long numer, long long denom);
+
+
+#define BUFF_LEN 0x18
+#define FLAGS_SPACE 1
+#define FLAGS_PLUS 2
+#define FLAGS_MINUS 4
+#define FLAGS_HASH 8
+#define FLAGS_ZERO 16
+
+// Pending Data for import:
+// u8 ldigs[] = "0123456789abcdef";
+// u8 udigs[] = "0123456789ABCDEF";
+
+extern u8 ldigs[];
+extern u8 udigs[];
+
+void _Litob(_Pft* args, u8 type) {
+    u8 buff[BUFF_LEN];
+    const u8* numMap;
+    s32 base;
+    s32 idx;
+    u64 num;
+    lldiv_t quotrem;
+
+    if (type == 'X') {
+        numMap = udigs;
+    } else {
+        numMap = ldigs;
+    }
+
+    base = (type == 'o') ? 8 : ((type != 'x' && type != 'X') ? 10 : 16);
+    idx = BUFF_LEN;
+    num = args->v.ll;
+
+    if ((type == 'd' || type == 'i') && args->v.ll < 0) {
+        num = -num;
+    }
+
+    if ((num != 0) || (args->prec != 0)) {
+        buff[--idx] = numMap[num % base];
+    }
+
+    args->v.ll = num / base;
+
+    while ((args->v.ll > 0) && (idx > 0)) {
+        quotrem = lldiv(args->v.ll, base);
+        args->v.ll = quotrem.quot;
+        buff[--idx] = numMap[quotrem.rem];
+    }
+
+    args->n1 = BUFF_LEN - idx;
+
+    memcpy(args->s, buff + idx, args->n1);
+
+    if (args->n1 < args->prec) {
+        args->nz0 = args->prec - args->n1;
+    }
+
+    if ((args->prec < 0) && (args->flags & (FLAGS_ZERO | FLAGS_MINUS)) == FLAGS_ZERO) {
+        idx = args->width - args->n0 - args->nz0 - args->n1;
+        if (idx > 0) {
+            args->nz0 += idx;
+        }
+    }
+}