>>55243081>>55243118It's not at all as complicated as some of the guides have made it seem. You just need to get Smeargle to transform into whatever and then have it get stuck in the world geometry when the game tries to despawn it. You don't need to have a specific moveset or whatever, you can just run.
https://twitter.com/arcanigon/status/1746282183973581291Big Pokémon are easier since they have a larger hitbox, but it's possible with small ones too.
https://www.youtube.com/watch?v=NKE4Gob6FlwIt might be difficult to patch since it seems like it's exploiting how the game handles despawning, but they could just make it so that Smeargle un-transforms and runs if it's transformed when the battle ends, like wild Ditto do.
>>55243096>>55243169The glitch works by turning wild Smeargle into clones of one of your Pokémon, which you can treat like any other wild encounter, including catching it.
Since it's a wild encounter, catching it will overwrite the usual data that gets recorded when you catch a Pokémon, like what ball it's in, assigning it your OT, and most importantly its catch location.
This is not useful as a general cloning glitch because the Pokémon will have illegal catch locations. You can't catch Arceus in the Savannah Biome, for example, so the game will notice that, flag it as illegal and not let you bring it online with other people or trade/transfer it.
If you use this to clone a Pokémon that can legitimately be caught in the Terrarium, it MIGHT be a legal legitimate clone. I'm not an expert and I haven't tried it myself, some other data might get fucked with that either SV or HOME might catch. For example, if you clone a Pokémon that you brought in from HOME, like a starter from another game, it would probably still have the tracker that HOME uses to catch clones and get flagged it you tried to transfer it out, even if it's apparently legal otherwise.