Index: .coafile
===================================================================
--- .coafile
+++ .coafile
@@ -4,7 +4,7 @@
 ignore = source/third_party/**
 
 [JS]
-bears = ESLintBear, JSHintBear
+bears = ESLintBear, JSHintBear, MirageBear
 eslint_config = build/jenkins/lint-config/eslintrc.json
 jshint_config = build/jenkins/lint-config/jshintrc.json
 files = binaries/data/**.js
Index: build/coala/MirageBear.py
===================================================================
--- /dev/null
+++ build/coala/MirageBear.py
@@ -0,0 +1,49 @@
+from coalib.bears.LocalBear import LocalBear
+from coalib.results.Result import Result
+
+import os
+import re
+
+class MirageBear(LocalBear):
+
+    """
+        Tries to detect unimplemented function calls on mirages.
+    """
+
+    LANGUAGES = {'Javascript'}
+    AUTHORS = {'Lancelot de Ferrière'}
+    LICENSE = 'GPL-2.0'
+    CAN_DETECT = {'Documentation', 'Formatting'}
+
+    def run(self, filename, file):
+
+        funcNames = set()
+        with open('binaries/data/mods/public/simulation/components/Mirage.js', 'r') as mirageFile:
+            line = mirageFile.readline()
+            while line:
+                match = re.match("Mirage\\.prototype\\.([aA-zZ_]+)", line)
+                if match != None:
+                    funcNames.add(match.group(1))
+
+                line = mirageFile.readline()
+
+        varNames = []
+        for line_number, line in enumerate(file):
+            match = re.match("(\\t*)(let|var) (.+?) = QueryMiragedInterface", line)
+            if match != None:
+                # Count the number of tabs as primitive scoping detection
+                tabs = len(match.group(1))
+                varNames.append((match.group(3), tabs))
+            else:
+                currTabs = len(re.match("(\\t*)", line).group(1))
+                delete = []
+                for varName, tabs in varNames:
+                    # if we are presumably out of scope, don't look for this variable name anymore.
+                    if currTabs < tabs:
+                        delete.append((varName, tabs))
+                        continue
+                    funcCalls = re.findall(f"{varName}\\.([aA-zZ_]+)\\(", line)
+                    for funcCall in funcCalls:
+                        if funcCall not in funcNames:
+                            yield Result.from_values('MirageBear', f"Possibly miraged function call {varName}.{funcCall}() appears to be unimplemented in Mirage.js.", file = filename, line = line_number + 1, severity = 2)
+                [varNames.remove(x) for x in delete]