Deoxys (Attack Forme)

Game data

Deoxys (Attack Forme) sits here because the games give its Attack Forme a base Speed of 150. That integer is a battle stat. The explanation is game lore, not a running speed.

1. A stat, not a stopwatch

   Base Speed is the number a battle uses before natures, items and stages. PokéAPI, Bulbapedia and Serebii agree on 150 for Deoxys (Attack Forme). None of them timed an animal.

2. Attack Forme, still very quick

   The Attack Forme moves stats toward offense and keeps a high Speed. It is not the Speed Forme, which is why the two rows are not tied. Both are game data for the same species.

3. Attack Forme

   Deoxys (Attack Forme) is Deoxys's Attack Forme. The games publish a separate stat block, so it is not folded into the base form.

Nearby on the base Speed list: Calyrex (Shadow Rider) and Deoxys. Same kind of stat. Different lore.