What are all Pokemons that learn Extreme Speed by a special way and how?

Question

name /how /game

Answer 1

Here you go.

• Dratini, from Dragon's Den for getting all questions correct (Gold, Silver, Crystal, HeartGold, SoulSilver)
• Zigzagoon from Pokemon Box event (Ruby, Sapphire)
• Deoxys from Pokemon Ranger and various other events (Gen 4)
• Raikou, Entei, Suicune in various events (Gen 4)
• Pikachu from various events (Gen 5)
• Dragonite from an event (Gen 5)
• Genesect from an event (Gen 5)

Bulbapedia lists all the specific details of the events, I see no point in writing them all out here when you can follow a link and find them that way.