By regional Pokédex number, 001 may refer to:
- #001 Bulbasaur, in the National and Kanto Pokédex
- #001 Chikorita, in the New Pokédex and the Johto Pokédex
- #001 Treecko, in the Hoenn Pokédex
- #001 Turtwig, in the Sinnoh Pokédex
- #001 Snivy, in the Unova and New Unova Pokédex
By Browser number, 001 may refer to:
- R-001 Bulbasaur, in the Fiore Browser
- R-001 Pichu, in the Almia Browser
- R-001 Pidgey, in the Oblivia Browser
- S-001 Heatran, in the Oblivia Browser
- N-001 Piplup, in the Oblivia Browser (Past)
- X-001 Deoxys, in the Oblivia Browser (Past)
By hexadecimal identifier, 001 may refer to:
- Rhydon, a Pokémon whose in Generation I has the index number of 001
- Bulbasaur, a Pokémon whose in Generation II and onward has the index number of 001
- The Master Ball, a Pokéball whose index number is 001
- The index number for the move Pound
In the Pokémon anime series, 001 may refer to:
- Pokémon - I Choose You!, episode 1 of the original series
- Get the Show on the Road, episode 1 of the Advanced Generation series
- Following a Maiden's Voyage!, episode 1 of the Diamond & Pearl series
- In The Shadow of Zekrom!, episode 1 of the Black & White series
- Pokémon the First Movie - Mewtwo Strikes Back, the first full-length Pokémon movie
- Pikachu's Vacation, the first Pikachu short animation
- A Family That Battles Together Stays Together!, the first side story episode
In the Pokémon games, 001 may refer to:
- Route 1, a route in Kanto
- Route 1, a route in Unova
- The island commonly referred to as One Island, officially named Knot Island
- The town named One Island on Knot Island
- TM01, a Technical Machine
- HM01, a Hidden Machine
- Cheri Berry, a Berry that debuted in Generation III
- XD001, a Pokémon from Pokémon XD: Gale of Darkness
- ZERO-ONE, a vehicle in Pokémon Snap
- Secret Storage 1, a location in Pokémon Trozei!
- Huge Storage 1, a location in Pokémon Trozei!
- Phobos Mobile No.1: Phobos Train, a location in Pokémon Trozei!
- SOL Laboratory 1, a location in Pokémon Trozei!
In the Pokémon manga, 001 may refer to:
- A Glimpse of the Glow, round 1 in the Red, Green & Blue chapter of Pokémon Adventures
- In Search of the Legendary Pokémon Dialga!!, chapter 1 of Pokémon Diamond and Pearl Adventure!
- Deoxys, The Phantom Pokémon! (Part 1), the first special chapter in Pokémon Diamond and Pearl Adventure!
- Pokémon to the Rescue!, chapter 1 of Pokémon Mystery Dungeon: Ginji's Rescue Team
- Pikachu, I See You!, chapter 1 of The Electric Tale of Pikachu
- Hoppip, The Wind Calls!, chapter 1 of Ash and Pikachu
- Prologue: Masara Town, chapter 1 of Pokémon Zensho
- Let's Go! The Journey Towards The Championship, chapter 1 of Pokémon Gold & Silver: The Golden Boys
- The Day Dratini Grew Up, chapter 1 of How I Became a Pokémon Card
- District Convention "Kenta, to the Open Sea", chapter 1 of Mezase!! Card Master
- Behold The Phantom Thief Of Justice, chapter 1 of Phantom Thief Pokémon 7
- The Pokémon Clefairy Enters!!, chapter 1 of Pokémon Pocket Monsters
- Let's Go Catch The Dumpling Thief!!, chapter 1 of Pokémon Ruby-Sapphire
- Enta Arrives at the Battle Frontier!, chapter 1 of Pokémon Battle Frontier
- How Do You Do, Pikachu?, chapter 1 of Magical Pokémon Journey
- A Destined Meeting (chamo!?), chapter 1 of Pokémon Chamo-Chamo ☆ Pretty ♪
- Enter Shū & Pikachu!, chapter 1 of Pokémon Get da ze!
- A Heated Battle Begins!!, chapter 1 of Pocket Monsters Platinum: Aim to Be Battle King!!
001 may also refer to:
- ONE, a CD single by Crystal Kay
- One, a song from the English soundtrack to The Power of One
- Generation I, the first set of Pokémon games