18 Vivillon Region-Based Forms, 2 Event Forms: GTS Helpful Guide
/Now with Pokémon HOME being out, you might be able to do trades over the GTS that seems more difficult back during the Pokémon X and Pokémon Y era. Vivillon was introduced in Generation 6 and encouraged GTS and Wonder Trades. Vivillon’s forms were decided through the region originally set on the 3DS, so trading is your best way to collect them all.
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