In the core series games
If held by a Beedrill (or is present in the player's Bag)PE, allows it to Mega Evolve into Mega Beedrill if its Trainer has a Key Stone. Each Trainer can only Mega Evolve one Pokémon per battle.
Unaffected by item negating effects (such as Embargo and Klutz). Item manipulating effects (such as Trick and Fling) cannot give Beedrill a Beedrillite or remove a Beedrillite from Beedrill.
Outside of battle
If held by a Beedrill, allows it to Mega Evolve into Mega Beedrill when it performs a Spectacular Talent during a Pokémon Contest Spectacular while its Trainer has a Key Stone. Beedrill will remain a Mega Beedrill until the Talent Round ends.
Pokémon holding Beedrillite in Pokémon Omega Ruby and Alpha Sapphire cannot be traded to Pokémon X and Y.
| One of a variety of mysterious Mega Stones. Have Beedrill hold it, and this stone will enable it to Mega Evolve during battle.
|| One of a variety of mysterious Mega Stones. This stone will enable Beedrill to Mega Evolve during battle.
In spin-off games
|| This section is incomplete.|
Please feel free to edit this section to add missing information and complete it.
In Pokémon Shuffle, the Beedrillite allows the player to Mega Evolve Beedrill.
The player can obtain the Beedrillite by completing the Competitive Stage available in Week 17 of the event rotation.
The Beedrillite was also available as a prize during the Mega Beedrill Competitive Stage. This Competitive Stage ran on both the Nintendo 3DS and Mobile versions from September 27 to October 4, 2016; August 15 to 22, 2017; December 19 to 26, 2017; and January 30 to February 6, 2018.
The Beedrillite enables the following Mega Evolution:
|| Mega Beedrill
|| Erases Pokémon and disruptions around a spot you tap.
Erases nine tiles in a square shape surrounding each spot. Does not activate if the foe is defeated. Only gives 3 seconds to tap. Can choose not to erase any.
The disruption countdown formerly did not decrease if this effect was triggered by the first match of the combo, but this was corrected in Version 1.3.28 (3DS)/1.9.1 (Mobile).
In the manga
In other languages
|| 大針蜂進化石 Daaihjāmfūng Jeunfa Sehk
|| 大針蜂進化石 / 大针蜂进化石 Dàzhēnfēng Jìnhuà Shí
|| 독침붕나이트 Tokchimbungnite