What was the largest reunion of the Pokedex holders in Pokemon Adventures to date?

Question

Was it the one in Emerald, with the first ten, or was there a larger one since?

Answer 1

The largest one is the Emerald one, as said in your question. It featured all the ones from Kanto, Johto, and Hoenn. There has not been a larger reunion since.
Source: Reading almost all of the Pokémon Adventures Manga because I’m a manga nerd.

Comments

even xy?

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What do you mean by ‘XY’? Was there a larger group met in the XY Pokémon Adventures manga I was not aware of?

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no i mean did you read the xy manga

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Most of it, but I didn’t finish because I kind of lost interest in that part of the series, but I searched for it, and I didn’t see any other reunions so...