| Problem | Likely Solution | |--------|----------------| | | Remove mods. Some character mods or skins break with version bumps. | | “Unable to start software” error | You’re missing required system firmware on emulator. Update Yuzu/Ryujinx to latest and ensure prod.keys are current. | | Update won’t install | Install base game first, then 13.0.0, then 13.0.1, then 13.0.3 – no skipping. | | Replays still broken | Replays are tied to exact version. If you updated from 12.x, old replays are permanently incompatible. |

: This update does not include any character balance adjustments or new fighter content.

⚠️ Update 13.0.3 requires base game version 13.0.0 or higher . If you’re still on an older version (e.g., 12.0.0), you must install 13.0.0, then 13.0.1, then 13.0.3 sequentially.

Super Smash Bros. Ultimate version 13.0.3 patch notes released

For emulator or modded Switch users only.

13.0.2 (November 2021) addressed some of these, but stability issues persisted in the netcode’s input buffer. 13.0.3 was the polish patch that should have been 13.0.2—a final sweep to ensure that the definitive edition of Ultimate was as stable as possible before Nintendo moved its development resources entirely to other projects.