List of unobtainable items

This is a list of all key items that appear in the coding of Generation IV games, but are not available in them for whatever reason. This does not include key items that are found in the code of Pokémon HeartGold and SoulSilver that are only available in Pokémon Diamond, Pearl, and Platinum, such as the key to the Valley Windworks, but instead items that are not available in any of the games of the generation. Their sprites and bag descriptions remain, however, they are unobtainable and will have no use whatsoever if they are hacked into the bag.

In Diamond, Pearl, and Platinum

Many of these items were intended to be introduced in Diamond and Pearl, but did not make the cut to actual gameplay.

Red Chain

Main article: Red Chain

The Red Chain, while a major part of the storyline of the Sinnoh trio of games, was apparently initially to be available to the player to summon Dialga and/or Palkia, much like items of previous generations summoned the legendary version mascots to battle.

Its bag description is as follows:

A mythical chain that is said to link the legendary Pokémon that created the Sinnoh region.
It is said that the Red Chain summons Dialga and Palkia when it is put together.

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