Dubious Disc

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

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.

In the core series games


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


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.
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 Shop (12000 Poké Coupons, after completing Little Battle)
BW P2 Laboratory Route 13 (treasure hunter)
B2W2 P2 Laboratory Join Avenue (Antique Shop), Black City (Store 4)
XYORAS Battle Maison (32 BP)
PMC* Balloon Popping (Lv. 1)
SMUSUM Aether Paradise Battle Tree (32 BP)
SwShIA Workout Sea Cram-o-matic (Electric: 102-110 points)
BDSP Route 225 Battle Park (5 BP)
LA Trading post (1,400 MP)
Ginkgo Guild cart (randomly sold by Ginter, as "Transparent Mechanism")
Space-time distortions
SVID Polar Biome
Reward for registering 110 Pokémon in the Blueberry Pokédex
Blueberry Academy School Store (250 BP)
Item Printer


Games Event Language/Region Distribution period
PW Pokéwalker Spot items Korean January 7 to 31, 2011



Bag Dubious Disc LA Sprite.png
Bag sprite from
Legends: Arceus

In the 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 1000Poké currency.png 1Poké currency.png


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)


MDBag Dubious Disc TDS Sprite.png
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 *
France Flag.png French CD Douteux
Germany Flag.png German Dubiosdisc
Italy Flag.png Italian Dubbiodisco
South Korea Flag.png Korean 괴상한패치 Goesang-han Patch
Spain Flag.png Spanish Disco ExtrañoGen VI+
DiscoxtrañoGen IV-V

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