diff --git a/stdlib/system.sun b/stdlib/system.sun
index 7bb983e..2ef1b9c 100644
--- a/stdlib/system.sun
+++ b/stdlib/system.sun
@@ -14,3 +14,92 @@ builtin setSystemFlag(flag, value);
 
 function setOnSystemFlag(flag) { setSystemFlag(flag, true); }
 function setOffSystemFlag(flag) { setSystemFlag(flag, false); }
+
+// ================================================= \\
+// POLLUTION
+// ================================================= \\
+
+builtin isGraffitoCoverage0();
+builtin getPollutionLevel();
+builtin setGraffitoMultiplied(a);
+builtin setPollutionIncreaseCount(count);
+
+// ================================================= \\
+// EVENT
+// ================================================= \\
+
+builtin setEventForWaterMelon(a);
+builtin setEventID(a, b);
+builtin isMapEventFinishedAll(a);
+
+// ================================================= \\
+// DEMO
+// ================================================= \\
+
+builtin isDemoMode();
+builtin fireStartDemoCamera(a);
+builtin launchEventClearDemo();
+
+// noki bay
+builtin startMareBottleDemo();
+builtin isFinishMareBottleDemo();
+
+function waitForFinishDemo() {
+	while (true) {
+		if (isDemoMode()) {
+			break;
+		}
+		yield;
+	}
+	while (true) {
+		if (isDemoMode() == false) {
+			break;
+		}
+		yield;
+	}
+}
+
+// ================================================= \\
+// TIME
+// ================================================= \\
+
+builtin setTimeLimit(limit);
+builtin setAttentionTime(time);
+
+builtin getTime();
+builtin getRestTime();
+
+builtin insertTimer(a, b);
+builtin startTimer();
+builtin stopTimer();
+
+// ================================================= \\
+// MISCELLANEOUS
+// ================================================= \\
+
+builtin invalidatePad(num);
+
+builtin isGameModeNormal();
+builtin isBossDefeated();
+
+builtin registerMovie(movie);
+
+// appear
+builtin appearReadyGo();
+builtin startAppearJetBalloon(a, b);
+
+// nozzle
+builtin changeNozzle(nozzle);
+builtin changeSunglass(sunglass);
+builtin putNozzle(nozzle);
+
+// death
+builtin startMiss();
+builtin gameOver();
+
+// fruit
+builtin eggYoshiStartFruit(a);
+
+builtin getFruitNum(a, b);
+builtin setFruitType(a, b, c);
+builtin resetFruitNum(fruit);