What is the currently displayed in your DSi settings?
The two main pillars of DSi CFW are and Unlaunch . HiyaCFW is an open-source CFW that redirects the system to use files on the SD card (called SDNAND), enabling you to customize your DSi Menu, run out-of-region DSiWare (including 3DS-exclusive titles), and protect your internal NAND memory. Unlaunch is a bootrom exploit that installs itself to the system's internal memory, allowing you to launch custom firmware immediately when you turn on the console.
If your console doesn't have Flipnote Studio , there are other entry points, but the most reliable and common method is using a DSiWare exploit. depending on your current version. The most reliable guide for installing CFW is dsi.cfw.guide , which provides a free, step-by-step walkthrough for any console on any firmware version. Nintendo Dsi Firmware Download
If your DSi is not yet on version 1.4.5, you may encounter compatibility issues with certain late-generation retail games or modern homebrew applications. How to Check Your Current DSi Firmware Turn on your Nintendo DSi.
Firmware is the permanent software programmed into a device’s read-only memory. For the DSi, the firmware is effectively its operating system. It controls the user interface (the DSi Menu), manages system settings, handles network connectivity, and provides the essential framework for running games and applications like DSi Camera and DSi Sound. Unlike a standard Nintendo DS or DS Lite, the DSi includes a full-fledged, updatable operating system, a feature more akin to the contemporary Nintendo Wii and the PlayStation Portable (PSP) than to its handheld predecessors. What is the currently displayed in your DSi settings
If you want to modify your console, you are actually looking for Custom Firmware (CFW). is the premier custom firmware for the Nintendo DSi. It runs entirely from your SD card.
This comprehensive guide covers everything you need to know about finding, installing, and utilizing DSi firmware safely. Understanding Nintendo DSi Firmware Unlaunch is a bootrom exploit that installs itself
If you haven't modded your DSi yet but have a compatible flashcart: DSPico Setup Guide & Review: The Open Source DSi Flashcart