In that question, the original question the user was asking about is that "Can Oshawott from White 2 be traded to SoulSilver" the answer is NO. Oshawott didn't exist in Gen 4. For some stupid reason this turned into a CRQ with the title "What Games can I transfer my Pokémon to?".
I agree with you that we should have asked a completely new question and used that instead. This is what we've since done for the most recent "common repeat" questions. However, as others mentioned, I don't think this matters very much today.
I removed the two answers on that thread which no longer address what the title says.
This doesn't make sense that transfering a Pokémon introduced in a future generation be transfered into earlier generations like: "Can I transfer my Sobble from Sword to SM/USUM or LGPE" then the answer is NO. Sobble didn'r exist in those games.
I'm not sure what point you're making here. You can see on the flowchart that Sobble can't be transferred from Sword to a Gen 7 game. There are no ingoing arrows from Sw/Sh or Home toward S/M, US/UM, or LGP/E.
Take note that the arrows are one-way; a Pokemon cannot be transferred against the direction of the arrowhead (and where it can be transferred both ways, a second arrow going the opposite direction is included).
You mods need to pick or create an question that is fitting and functional to any transferring methods. You can't transfer a Pokémon introduced in a future generation to a earlier generation.
Can you elaborate further on why the existing answer is insufficient? At what point does the flowchart suggest that a Pokemon introduced in a future generation can be transferred to an earlier generation?
The answer shows that Pokemon in Gen 2 can be transferred backward to Gen 1, but specifically notes that this is only possible "if the Pokemon is present in Gen 1 and it knows only moves present in Gen 1".