As we see in this Question/Answer, Pokémon Go now contains special items that are used to evolve certain Pokémon in Generation II.
- Seadra → Kingdra (Dragon Scale + 100 Horsea Candy)
- Slowpoke → Slowking (King's Rock + 50 Slowpoke Candy)
- Poliwhirl → Politoed (King's Rock + 100 Poliwag Candy)
- Onix → Steelix (Metal Coat + 50 Onix Candy)
- Scyther → Scizor (Metal Coat + 50 Scyther Candy)
- Gloom → Bellossom (Sun Stone + 100 Oddish Candy)
- Sunkern → Sunflora (Sun Stone + 50 Sunkern Candy)
- Porygon → Porygon2 (Upgrade + 50 Porygon Candy)
Are these Generation II Pokémon catchable in the wild, or are they only obtainable through evolving since they require a special items?
Best Answer
According to data compiled in this reporting, it does not look like second generation evolutions that require an evolutionary item are available in the wild.
This thread has amassed data over a 24 hour period in Lisbon, Portugal and recorded 0 item evolution spawns, which supports that they are not available in the wild.
Another thread that has compiled data that was taken over roughly a week says that exactly 0 Porygon2, Sunflora, Steelix, Scizor, Slowking, Kingdra, Politoed, Bellossom, Umbreon, or Espeon have spawned in that timeframe.
Since Crobat and Blissey do not require evolutionary items to evolve, however, these appear to be catchable.
It does not seem like Umbreon or Espeon have been seen in the wild, though. This may be due to the friendship requirement to evolve them (aside from the one-time naming trick).