PokéBase - Pokémon Q&A
1 vote
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If I trade the regis in via Pokemon Home.

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2 Answers

1 vote
 
Best answer

Just tested it you need to catch all the of the regis from the chambers.

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That was a fast best answer
I was in the middle of testing.
Hmm... Interesting.  Want me to hide my answer?
Yeah it's wrong
4 votes

To enter, the player must have Regirock, Regice, and Registeel in their party after advancing to a certain point in Crown Tundra's story.

Source: https://m.bulbapedia.bulbagarden.net/wiki/Split-Decision_Ruins

Since you just need to have them in your party, you can trade them from Home and it should work.

Edit: Turns out you need to catch them from the chambers.

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edited by