From Glitch City Laboratories
The dress up Hiker glitch, is a frequent term for a minor glitch which only exists within Pokémon Diamond and Pearl. When exploited, it allows the player to change his or her orientation on the game screen, just prior to entering the dress-up room on the second floor of the Jubilife TV building, hence the player will still follow a path based on the direction that he or she is facing, but may 'end up' in the dressing room without actually walking through its entrance. Whilst one of these relative paths is being taken, since no clipping techniques are defined for forced movement, the player is likely to either walk through a wall or the hiker himself.
The glitch was fixed on Pokémon Platinum, simply because of the fact that the "Ooh, choose which Pokémon you want to dress up." message cannot be exited by pressing a button on the direction pad.
- The player requires access to at least Jubilife City.
- At least one Pokémon in the player's party.
- A Fashion Case is needed.
- The player must travel to the second floor of the Jubilife TV building.
- Proceed into the room with a Hiker whom allows the player to dress up a Pokémon.
- Talk to the Hiker from any direction and choose YES at his question "I will snap a photo when you're done. You will do this, won't you?"
- The player can either choose YES or NO at the next question "Should I explain to you how to dress up your Pokémon", it will be a quicker process if the player chooses NO however.
- When the Hiker says "Ooh, choose which Pokémon you want to dress up.", instead of exiting the dialogue box via the A, B or X button, choose any button on the directional pad and the player's direction will change. This will also close the dialogue box and the game will proceed to the party interface.
- Choose any Pokémon, and the game will force the player character to move in a relative path depending on his or her orientation.
The path that the player travels, as well as when to open the dress up interface after closing the party screen is determined by a simple set of instructions which in normal gameplay, would lead the player to the dress-up room without walking through the Hiker, or any walls nearby. For all orientations of the player except for the south direction (which has no corresponding instruction), if the player is facing a certain direction, the game will force the player to walk in a certain path and then display the dress up interface and afterwards the game follows another instruction to return the player to a travellable position within the room.
Below is a table, noting the instructions that the game will follow for a certain path that the player is facing, once a Pokémon is selected.
||Travel two steps north, activate the dress up menu interface, (if closed by the player, travel two steps south).
||Travel one step right, travel one step north, activate the dress up menu interface (if closed by the player, travel two steps south)
||Travel one step left, travel one step north, activate the dress up menu interface (if closed by the player, travel two steps south)
||Does not walk or open dress-up interface; it is as if the player never began the dress-up procedure.
In normal gameplay, in order to have been facing to the right the player would have to be one step to the left of the Hiker. To be facing left the player would have to be one step to the right of the Hiker and to be facing north the player would have to be one step to the south of the Hiker. In Pokémon Diamond and Pearl however, this glitch allows the player to change his or her direction once more to close the "Ooh, choose which Pokémon you want to dress up." message, hence the game would 'act' as if the player's co-ordinates were any of those mentioned above. No clipping techniques are defined for blocking the player, explaining why the player may be able to walk through walls or the Hiker after exploiting this glitch. One of the reasons for this is likely because in normal gameplay, the player would not attempt to walk through the Hiker or the wall anyway, so clipping techniques would not be required.
The exact reason why Nintendo allowed the player to close a dialogue box via the directional pad is unknown, although the feature was removed in later games such as Pokémon Platinum.