The official Japanese strategy guide for TFSP included three password cards:

Do not confuse an emulator "Save State" with an in-game "Save File." The data transfer mechanic strictly reads standard, in-game saved data located in the PSP system folders.

Locate your emulator's save directory. On PC, this is usually PPSSPP\memstick\PSP\SAVEDATA .

Here is the exact breakdown of what you receive based on the specific legacy save file you possess: Legacy Save File Used Exclusive Reward Unlocked Dark Magician Girl (Alternative Art) + Recipe Yu-Gi-Oh! Tag Force 2 Power Bond + Recipe Yu-Gi-Oh! Tag Force 3 Judgment Dragon + Recipe Yu-Gi-Oh! Tag Force 4 Stardust Dragon + Recipe Yu-Gi-Oh! Tag Force 5 Blackwing - Armor Master + Recipe Yu-Gi-Oh! Tag Force 6 No. 39: Utopia + Recipe

From the main menu, navigate to (データベース). Select Save Data Linkage (セーブデータ連動).

Some features, cards, or unlockable content in Tag Force Special are gated behind detecting save data from other Yu-Gi-Oh! Tag Force games or related titles on the same PSP memory stick. When the game detects qualifying save files, it grants exclusive cards, items, or bonuses not available through normal in-game progress alone.

If you are one of the lucky duelists who owns a PlayStation Vita (PS Vita) or a PSP, you likely know about the swan song of the Tag Force series: .

Save data fusion is a legacy feature utilized by Konami to reward loyal players who purchased previous entries in the franchise. By scanning your PSP's memory stick for save files from older Yu-Gi-Oh! Tag Force games, ARC-V Tag Force Special unlocks specific, exclusive legacy bonuses that are otherwise incredibly difficult or impossible to obtain through normal gameplay. Every Save Data Exclusive Reward

Save-data exclusives in Yu-Gi-Oh! ARC-V Tag Force Special reward players who’ve played earlier entries and encourage cross-title continuity. If you’re hunting every unlock, collect and place older Tag Force saves on your PSP memory stick, relaunch the game, and check shops/NPC interactions for newly available content.

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While not a direct unlock of all characters, having the data makes it smoother to interact with certain characters who appeared in Tag Force 6 , as the game recognizes your previous partnership history. How to Import Save Data (PSP & Vita)