Will Nintendo 3DS Update Block R4 Flashcart? Yes, Very Likely

Yes. Nintendo frequently updates 3DS firmware to block flashcarts (R4, Gateway, Sky3DS, etc.). Each update patches the exploit the cart relies on.

• Current firmware (11.17.0) blocks most older flashcarts.
• Newer carts (R4i Gold 3DS+, Ace3DS X) update their kernel to bypass blocks — requires a compatible DS/3DS to flash the update.
• Risk: Updating with a blocked cart inserted can brick the 3DS.

Safer path: Install Custom Firmware (Luma3DS) via 3ds.hacks.guide. Then run homebrew, backups, and emulators natively — no flashcart needed. Supports all firmware versions.