Route 13 Crystal walk encounters missing time restriction

[Eiim]

I was pulling Crystal encounter data and noticed that Pidgeotto had one encounter location which strangely wasn't time-restricted like its other encounter locations, Kanto Route 13. Bulbapedia said this encounter was restricted to morning and day, like its other encounters, so I decided to test in-game.

I loaded the VC edition of Crystal (to my knowledge, the only difference between GBC Crystal and VC Crystal with regards to encounters is the ability to obtain the GS Ball without an event) and did 30 encounters at night, without encountering a single Pidgeotto. At the given 20% spawn rate, there would be approximately a 0.1% chance of not getting a Pidgeotto. Then, I repeated in the morning and day, getting a Pidgeotto on the third and second encounters respectively, consistent with the given encounter rate.

Notably, the JSON has two identical encounter_details objects for this encounter, each of which appears to simply be missing an object in condition_values. Compare the (likely correct) Silver entry to the Crystal entry:

{
  "encounter_details": [
    {
      "chance": 20,
      "condition_values": [
        {
          "name": "time-day",
          "url": "https://pokeapi.co/api/v2/encounter-condition-value/4/"
        }
      ],
      "max_level": 25,
      "method": {
        "name": "walk",
        "url": "https://pokeapi.co/api/v2/encounter-method/1/"
      },
      "min_level": 25
    },
    {
      "chance": 20,
      "condition_values": [
        {
          "name": "time-morning",
          "url": "https://pokeapi.co/api/v2/encounter-condition-value/3/"
        }
      ],
      "max_level": 25,
      "method": {
        "name": "walk",
        "url": "https://pokeapi.co/api/v2/encounter-method/1/"
      },
      "min_level": 25
    }
  ],
  "max_chance": 40,
  "version": {
    "name": "silver",
    "url": "https://pokeapi.co/api/v2/version/5/"
  }
}

{
  "encounter_details": [
    {
      "chance": 20,
      "condition_values": [],
      "max_level": 25,
      "method": {
        "name": "walk",
        "url": "https://pokeapi.co/api/v2/encounter-method/1/"
      },
      "min_level": 25
    },
    {
      "chance": 20,
      "condition_values": [],
      "max_level": 25,
      "method": {
        "name": "walk",
        "url": "https://pokeapi.co/api/v2/encounter-method/1/"
      },
      "min_level": 25
    }
  ],
  "max_chance": 40,
  "version": {
    "name": "crystal",
    "url": "https://pokeapi.co/api/v2/version/6/"
  }
}

[Eiim]

This appears to affect all Pokemon that are encountered with the walk method here (i.e. regular tall grass encounter), which are Pidgeotto, Chansey, Noctowl, Hoppip, Quagsire, Nidorina, Nidorino, Venonat, and Venomoth. Pidgeotto is the only one I've tested explicitly, but I encountered the other ones at expected times during that testing, except for Chansey, who apparently occurs all-day and only at a 1% rate.

[SimplyBLGDev]

This issue can be closed now