{
  "showdown_id": "mewtwonitey",
  "pokemons": ["Mewtwo"],
  "aspect_conditions": {
    "apply": {
      "aspects": ["mega_evolution=mega_y"],
      "aspect": {
        "blacklist_aspects": [
          ["shadows"]
        ]
      }
    },
    "revert": {
      "aspects": ["mega_evolution=none"]
    }
  }
}