Dubious Disc

The Dubious Disc (Japanese: あやしいパッチ Dubious Patch) is a type of held item introduced in Generation IV. It allows Porygon2 to evolve into Porygon-Z.

Dubious Disc
Dubious Patch
Bag Dubious Disc Sprite.png
Dubious Disc
Pokémon Global Link artwork
Introduced in Generation IV
Generation IV Bag Items HGSS pocket icon.png Items
Generation V Bag Items HGSS pocket icon.png Items (Held items)
Generation VI Bag Items HGSS pocket icon.png Items
Generation VII Bag Items HGSS pocket icon.png Items
Generation VIII Bag Other Items SwSh pocket icon.png Other Items
Power 50

In the core series games


Games Cost Sell price
N/A  1050
B2W2  60000  1050
XYORAS N/A  1,050
N/A  1,000
BDSP N/A  1,050
LA N/A  500


Causes Porygon2 to evolve into Porygon-Z when traded while holding it. This consumes the Dubious Disc. In Pokémon Legends: Arceus, due to the absence of held items, the Dubious Disc simply needs to be used on Porygon2 to trigger the evolution, which consumes the item.


Games Description
A transparent device overflowing with dubious data. Its producer is unknown.
LA A transparent device overflowing with dubious data. It's loved by a certain Pokémon.


Games Finite methods Repeatable methods
DPPt Route 225, Team Galactic HQPt
HGSS Route 42
PBR 12000 Poké Coupons
BW P2 Laboratory Route 13 (treasure hunter)
B2W2 P2 Laboratory Join Avenue (Antique Shop), Black City (Store 4)
XY Battle Maison (32 BP)
ORAS Battle Maison (32 BP)
PMC Balloon Popping (Lv. 1)
SMUSUM Aether Paradise Battle Tree (32 BP)
SwSh Trade
SwShIoA Workout Sea Cram-o-matic (Electric: 102-110 points)
BDSP Route 225 Battle Park (5 BP)
LA Jubilife Village (1,400 MP)
Jubilife Village (randomly available from Ginter, as "Transparent Mechanism")
Space-time distortions



Bag sprite from
Legends: Arceus

In spin-off games

Pokémon Mystery Dungeon series

The Dubious Disc appears in Pokémon Mystery Dungeon: Explorers of Time, Explorers of Darkness, and Explorers of Sky.


Games Cost Sell price
MDTDS 1000  1 


If the player offers both a Link Cable and Dubious Disc at Luminous Spring, Porygon2 can be evolved into Porygon-Z. This consumes the Link Cable and Dubious Disc.

If thrown, it will deal 1 damage (2 if sticky). Using this item in a dungeon will consume it, with no effect.


Games Description
MDTDS An enigmatic disc that overflows with dubious data. It allows a certain kind of Pokémon to evolve.


Games Finite methods Repeatable methods
MDTDS Treasure Boxes, Job requests (★3-★9)
Happy Outlook (Kecleon Shop: B3F, B5F, B7F, B9F, B11F, B13F, B15F, B17F, B19F), Mt. Mistral (Kecleon Shop: 3F, 5F, 7F, 9F, 11F, 13F, 15F, 17F, 19F), Shimmer Hill (Kecleon Shop: 2F, 4F, 6F, 8F, 10F, 12F, 14F, 16F), Lost Wilderness (Kecleon Shop: B3F, B5F, B7F, B9F, B11F, B13F, B15F, B17F)


Sprite from
Explorers of Time,
, and Sky

In the TCG

Triumphant Porygon-Z

A Dubious Disc is featured in the artwork of the Triumphant Porygon-Z card.


  • Porygon-Z's Pokédex entries imply that the Dubious Disc was modified to enable it to work in alien dimensions, but that an unplanned error in the programming corrupted Porygon-Z and prevented it from fulfilling this purpose.

In other languages

Language Title
Chinese Cantonese 可疑修正檔 Hóyìh Sāujingdóng
Mandarin 可疑修正檔 Kěyí Xiūzhèngdàng *
可疑补丁 Kěyí Bǔdīng *
  French CD Douteux
  German Dubiosdisc
  Italian Dubbiodisco
  Korean 괴상한패치 Goesang-han Patch
  Spanish Disco ExtrañoGen VI+
DiscoxtrañoGen IV-V

  This item article is part of Project ItemDex, a Bulbapedia project that aims to write comprehensive articles on all items.