Dubious Disc

Where to find Dubious Disc in Platinum Emerald.

• Route 225 Area 1 (outside): on the ground
• Galactic Hq Area 1 (inside): on the ground
• Route 42: on the ground

Evolutions

• Porygon2 into Porygon-Z: Trade (the trade machine in any Pokemon Center), holding Dubious Disc