What accessory is required to play Guitar Hero: On Tour?

A Guitar Grip is required to play Guitar Hero: On Tour.

The Guitar Grip is a specialized accessory that plugs into the Nintendo DS’s Game Boy Advance cartridge slot. It supplies four colored fret buttons, allowing the player to hold the DS sideways and reproduce the basic hand position of a Guitar Hero controller.

Strumming works differently from the console games: the player uses a guitar-pick-shaped stylus across the DS touchscreen. The system displays the note highway on one screen while the grip and touchscreen combine to handle the player’s inputs.

The grip was bundled with On Tour and adapted for both the original Nintendo DS and the DS Lite through included adapters. It is not compatible with the Nintendo DSi or Nintendo 3DS, because those systems do not have the necessary Game Boy Advance slot. The same accessory was also used by later DS entries in the On Tour series.