What is the minimum amount of Pokémon you could have seen in your Pokédex after beating Ultra Sun or Ultra Moon?

Hey there, welcome to the weirdest question I’ve ever had the pleasure of asking.

Basically, if you beat Ultra Sun or Ultra Moon, how few Pokémon could possibly be in your Pokédex? This means that you didn’t encounter or catch any wild Pokémon or battle any Trainers that weren’t necessary to story progression. And for Trainers that you can win or lose the battle with and still progress the story, you lost to their first Pokémon. You also apparently beat the game with the base form of your starter, the only Pokémon in your party (which also allows you to not battle random Double Battle Trainers). You also refused all gift Pokémon that weren’t necessary to receive.

And by beating Ultra Sun or Ultra Moon, I mean completing the main game and the Rainbow Rocket episode.

Sorry for the very odd question, I’m just overly curious.

(And I’m really sorry if this is a duplicate.)

Pleaselog inorregisterto add a comment.

After playing through the whole game this way, I can report that the answer is161on Ultra Sun, or162on Ultra Moon (though the in-game dex only shows Alola dex entries, so it will give a number that’s lower by 15). You can follow along with the logic every step of the way, including what notable things have to be skipped, athttps://www.smogon.com/forums/threads/ultra-sun-dexit-challenge-seeing-as-few-pokemon-as-possible-complete.3669441/

If you cared about minimizing owned count, while there are no mandatory gift Pokemon other than the starter, in order to open the gate into Po Town you are required to partake in a double battle (if you only have one Pokemon, you simply don’t get to make progress past that point until you genuinely do bring a second healthy Pokemon along). If you’re keeping your game free of trades or other inter-game connectivity, this means you have to catch a second distinct species just for the purpose of taking on that battle, and can proceed to the end of the game with just that count of 2. However, if you do allow trades, you can pick up the Eevee egg from Paniola Ranch and trade it offbefore it hatchesto get a second copy of the same starter you chose, allowing you to participate in that double battle while still keeping your Owned count down at 1. Alternatively, you could import your second copy of the starter from Pokemon Bank, and even go up to a full team of 6 copies of the same unevolved starter if you’re doing it that way.

In chronological order (species marked with ^ are dependent on the particular starter you chose, but the count remains the same for any possible starter; I chose Litten so it’ll be written from the perspective of that):