All the facts below were taken from Bulbapedia.
- In the Pokémon Red and Blue beta, Magnemite was originally known as "Coil", from its Japanese name.
- Magnemite, along with its evolution Magneton, were pure Electric-type Pokémon in Generation I, but became dual-type Electric/Steel in Generation II. This makes them the first Pokémon to ever change typing.
- Magnemite is the first Steel-type Pokémon in National Pokédex order.
- Despite most of Magnemite's Pokédex entries saying they are able to float through the air by employing powerful electromagnetic waves or even anti-gravity, Magnemite does not have the Ability Levitate, so it is still affected by Ground-type moves. However, starting in Generation IV, Magnemite can learn Magnet Rise, which simulates Levitate for five turns.
- Magnemite, along with Magneton, has appeared in every regional Pokédex. This is due to the Sinnoh Pokédex's expansion in Platinum and the Unova Pokédex's expansion in Black 2 and White 2.
- Magnemite and its evolution Magneton are two of the few Pokémon that had their cry changed slightly in Generation III. This was due to Generation III utilizing a better sound effects game engine and newer game system.
- Pokémon Snap is the only form of a Pokémon canon that shows two Magnemite bonding, similar to a Magneton. However, when a picture is taken, they are still called Magnemite.
- Pokémon Mystery Dungeon: Red Rescue Team and Blue Rescue Team also showed this, but it was stated to be a failed evolution, due to the lack of a third Magnemite.
- In Generation V, Magnemite was the most traded Pokémon on the GTS. This is probably due to what is known as the Magnemite chain/coil: a scheme by which players could increase the number of visitors to their Join Avenue in Black 2 and White 2 by trading Magnemite on the GTS. The scheme originated with Japanese players and became popular worldwide.
- On May 31, 2017, The Pokémon Company posted a Magnemite-themed music video onto their YouTube channel titled Where is Coil? Here is Coil!.