Check your settings! Are you sure, you are using the correct input format, is each pokemon's binaries in a separate folder?
Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
  at System.ThrowHelper.ThrowArgumentOutOfRangeException (System.ExceptionArgument argument, System.ExceptionResource resource) [0x00029] in <eae584ce26bc40229c1b1aa476bfa589>:0 
  at System.ThrowHelper.ThrowArgumentOutOfRangeException () [0x00000] in <eae584ce26bc40229c1b1aa476bfa589>:0 
  at P3DS2U.Editor.PokemonImporter.GenerateMeshInUnityScene (P3DS2U.Editor.SPICA.H3D.H3D h3DScene, System.String exportPath, P3DS2U.Editor.P3ds2USettingsScriptableObject importSettings) [0x00514] in C:\Users\Steve\Documents\Unity\Pokemon Importer\Assets\3DStoUnity\Editor\PokemonImporter.cs:826 
  at P3DS2U.Editor.PokemonImporter.StartImportingBinaries (P3DS2U.Editor.P3ds2USettingsScriptableObject importSettings, System.Collections.Generic.Dictionary`2[TKey,TValue] scenesDict) [0x00242] in C:\Users\Steve\Documents\Unity\Pokemon Importer\Assets\3DStoUnity\Editor\PokemonImporter.cs:109 
UnityEngine.Debug:LogError (object)
P3DS2U.Editor.PokemonImporter:StartImportingBinaries (P3DS2U.Editor.P3ds2USettingsScriptableObject,System.Collections.Generic.Dictionary`2<string, System.Collections.Generic.List`1<string>>) (at Assets/3DStoUnity/Editor/PokemonImporter.cs:112)
P3DS2U.Editor.P3ds2USettingsScriptableObject:StartImporting () (at Assets/3DStoUnity/Editor/P3ds2USettingsScriptableObject.cs:257)
P3DS2U.Editor.P3ds2USettingsScriptableObjectEditor:OnInspectorGUI () (at Assets/3DStoUnity/Editor/P3ds2USettingsScriptableObject.cs:409)
P3DS2U.Editor.Pokemon3DSToUnityEditorWindow:OnGUI () (at Assets/3DStoUnity/Editor/Pokemon3DSToUnityEditorWindow.cs:49)
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)


Something went horribly wrong! Hmu, I'll try to fix it.
Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
  at System.ThrowHelper.ThrowArgumentOutOfRangeException (System.ExceptionArgument argument, System.ExceptionResource resource) [0x00029] in <eae584ce26bc40229c1b1aa476bfa589>:0 
  at System.ThrowHelper.ThrowArgumentOutOfRangeException () [0x00000] in <eae584ce26bc40229c1b1aa476bfa589>:0 
  at P3DS2U.Editor.PokemonImporter.GenerateMaterialFiles (P3DS2U.Editor.SPICA.H3D.H3D h3DScene, System.String exportPath, P3DS2U.Editor.P3ds2UShaderProperties shaderImportSettings) [0x00669] in C:\Users\Steve\Documents\Unity\Pokemon Importer\Assets\3DStoUnity\Editor\PokemonImporter.cs:675 
  at P3DS2U.Editor.PokemonImporter.StartImportingBinaries (P3DS2U.Editor.P3ds2USettingsScriptableObject importSettings, System.Collections.Generic.Dictionary`2[TKey,TValue] scenesDict) [0x0028d] in C:\Users\Steve\Documents\Unity\Pokemon Importer\Assets\3DStoUnity\Editor\PokemonImporter.cs:120 
UnityEngine.Debug:LogError (object)
P3DS2U.Editor.PokemonImporter:StartImportingBinaries (P3DS2U.Editor.P3ds2USettingsScriptableObject,System.Collections.Generic.Dictionary`2<string, System.Collections.Generic.List`1<string>>) (at Assets/3DStoUnity/Editor/PokemonImporter.cs:164)
P3DS2U.Editor.P3ds2USettingsScriptableObject:StartImporting () (at Assets/3DStoUnity/Editor/P3ds2USettingsScriptableObject.cs:257)
P3DS2U.Editor.P3ds2USettingsScriptableObjectEditor:OnInspectorGUI () (at Assets/3DStoUnity/Editor/P3ds2USettingsScriptableObject.cs:409)
P3DS2U.Editor.Pokemon3DSToUnityEditorWindow:OnGUI () (at Assets/3DStoUnity/Editor/Pokemon3DSToUnityEditorWindow.cs:49)
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)