Pokemon Brilliant Diamond 1.3.0 Update May 2026

Before 1.3.0, players experienced a variety of irritating glitches. This patch addressed the most game-breaking ones:

Performance Verdict: The game runs smoother, but it did not magically turn the game into a high-performance powerhouse. Framerate drops in the Grand Underground still occur, though they are less frequent than at launch.

The spawn tables for each Hideaway (e.g., Grassland Cavern, Spacious Cave) were overhauled. pokemon brilliant diamond 1.3.0 update

1. Union Room Overhaul (The Biggest Fix)
The most user-facing change: players can now link up with anyone via local or online without needing to be in the same “room code” session in a clunky menu. The update streamlined the Union Room interface, cutting lag when entering/exiting and fixing desyncs that plagued multiplayer battles and trades. For fans of the Underground’s secret bases, this also meant smoother co-op digging for spheres and fossils.

2. Pokémon Home Compatibility (The Real Headline)
While technically launched just before 1.3.0, this patch cemented full Pokémon HOME integration—allowing transfers from Legends: Arceus, Sword/Shield, and GO. Suddenly, the limited Sinnoh Pokédex expanded. You could finally bring in Hisuian forms (like Hisuian Growlithe and Zoroark) into Sinnoh, though they weren’t usable in the main story until post-game. This made competitive breeding and shiny hunting far more viable. Before 1

3. Battle-Ready Fixes for VGC
Several moves and abilities got subtle backend tweaks:

4. Ramanas Park Adjustments
Slates for legendary encounters (Ho-Oh, Lugia, etc.) now have a slightly higher drop rate from digging in the Grand Underground. Also, a soft-lock was removed where leaving the park while a legendary was mid-battle could freeze the game. Performance Verdict: The game runs smoother, but it

5. Minor Quality of Life

If your game is still on 1.1.2 or 1.2.0, here’s how to update:

Note: If you’re on physical cartridge (version 1.0.0), you’ll need to sequentially update to 1.1.0 → 1.2.0 → 1.3.0. The Switch handles this automatically.

The Union Room in BDSP was widely panned for lag and restrictive features. Version 1.3.0 addressed this by adding the Colosseum Battle Test—a new mode accessible via the Global Union Room.