TL;DR
- New PokeDupeChecker system blocks cloned Pokemon from trading and transfers
- Legends: Arceus Pokemon confirmed exportable with unique origin symbols
- Strange Ball replaces incompatible Poke Balls during cross-game transfers
- Update lays foundation for future Pokemon HOME compatibility across multiple titles
- Shiny Pokemon value protected through technical validation of authenticity

Pokemon Brilliant Diamond and Shining Pearl faced a serious integrity issue when players discovered menu-based duplication exploits that could clone any Pokemon indefinitely. These glitches threatened to completely devalue rare shiny and legendary Pokemon by flooding the trading ecosystem with identical copies.
The newly implemented PokeDupeChecker represents a sophisticated technical countermeasure designed specifically to detect Pokemon created through these duplication methods. This validation system scans for specific data patterns that indicate cloned origin, preventing such Pokemon from being traded or transferred out of the game entirely.
Understanding the cloning mechanics reveals why this was necessary: players exploited conflicting menu systems to duplicate entire boxes of Pokemon simultaneously. One menu would move Pokemon between boxes while another would preserve the originals, creating perfect copies without the intended breeding or catching processes.
With every legendary Pokemon from the first four generations available as shinies in BDSP, the potential economic impact on Pokemon trading was substantial. While the PokeDupeChecker won’t eliminate all cloned Pokemon from circulation, it significantly reduces their impact by preventing further distribution through official channels.
Beyond the anti-cloning measures, data miners uncovered framework for importing Pokemon from Pokemon Legends: Arceus into the BDSP ecosystem. This discovery confirms cross-game compatibility is actively being developed.
The presence of origin symbols specifically tied to Legends: Arceus indicates that Pokemon caught in that game will be exportable to other titles. While initially discovered in BDSP’s code, this infrastructure likely extends to future Pokemon games including potential Sword and Shield integration.
A significant compatibility challenge involves Poke Ball mechanics. Legends: Arceus introduced several new ball types and reimagined classics like the Heavy Ball, which don’t exist in BDSP’s game engine. The solution appears to be the “Strange Ball” – previously used placeholder for invalid Poke Ball IDs that will now serve as a universal container for incompatible ball types during transfers.
Although the technical foundation has been established, full Pokemon HOME compatibility for Legends: Arceus, Brilliant Diamond, and Shining Pearl remains pending. The discovered code suggests this functionality could become available in upcoming updates, creating a unified Pokemon storage and transfer system across multiple Switch titles.
For serious Pokemon collectors, this update fundamentally changes strategic approaches to shiny hunting and trading. The assurance that cloned Pokemon cannot enter the legitimate trading ecosystem preserves the value of legitimately obtained rare Pokemon.
Common mistakes players should avoid include attempting to trade Pokemon that trigger the PokeDupeChecker, which results in blocked transactions. Advanced collectors should focus on documenting legitimate acquisition methods and maintaining detailed records of their collections.
Optimization tips include focusing on Pokemon with verifiable origin stories and avoiding trades that seem suspiciously favorable. The time investment for legitimate shiny hunting remains substantial, but now carries guaranteed long-term value retention.
Looking forward, collectors should prepare for the expanded Pokemon HOME compatibility by organizing their collections across multiple games. Understanding how the Strange Ball system works will be crucial for managing Pokemon transferred from Legends: Arceus, as these will maintain their unique characteristics despite the ball change.
Action Checklist
- Verify your Pokemon don’t trigger PokeDupeChecker before attempting trades
- Document acquisition methods for valuable Pokemon to prove legitimacy
- Research legitimate shiny hunting methods for target Pokemon
- Prepare Legends: Arceus Pokemon for future HOME transfers
- Monitor official announcements for Pokemon HOME compatibility updates
No reproduction without permission:Games Guides Website » Pokemon BDSP update stops trades of duplication glitch clones How Pokemon HOME's new anti-cloning system protects shiny Pokemon value and enables cross-game transfers
