How do you get Serebii in Pokemon soul silver version?

In Pokémon Soul Silver, Serebii is not directly obtainable in the game. However, you can catch a Serebii by trading with other players who have it or by using external methods like events or special distributions if they were available during the game's original run. Additionally, you could use Pokémon transfer services from later games where Serebii is available, such as Pokémon SWord and Shield.