In Legends: Arceus, all Legendary & Mythical Pokémon have predetermined internal values that can be predicted in advance using RNG manipulation. Currently, not all legendary/mythical Pokémon can be predicted on retail hardware, but the ones that can be predicted are predictable with 100% consistency with no timing required. Learning how this works allows you to obtain most Legendary/Mythical Pokémon in the game with desired IVs & Natures.
Legendary/Mythical Pokémon are not all generated the same way and there are two seperate categories that they fall into "Main RNG" or "Spawner RNG". Only those that fall into the Spawner RNG category can be manipulated on retail hardware at this current time. Here is a list encounters tied to Spawner RNG:
Anything not included in this list is in the Main RNG category and cannot currently be manipulated on retail hardware. In the event that more research is done that gives retail players access to the Main RNG state this guide will be updated to support those encounters.
You can find a SysBot by searching online for "Legends: Arceus SysBot server" or by asking in relevant communities. This RNG utilizes someone elses Custom Firmware Switch to assist in dumping the relevant Pokémon files on your behalf.
Before starting, make sure your game is properly set up and that you have the required resources to ensure the RNG process is as smooth as possible. It is assumed that you have progressed the story enough to spawn your target Pokémon. If you have not yet done so you should go back and do this now.
Communications tab of the pause menu, set Internet Connection to Off and Automatically Connect? to No.Help tab of the pause menu, open the Settings and navigate to Autosave, ensure that it is set to Disabled.Figure 1 - ParLiAment Overview
You will be presented with the above screen when opening ParLiAment for the first time. The left-most and right-most columns are for those running manipulating Main RNG encounters using Custom Firmware, these two columns can be safely ignored.
Our focus will be on the middle two columns, here we can see some tabs towards the top of the window labelled Group Seed Solver and Overworld Legendary (Spawner), which perform the actions we need for this RNG.
To learn more about how to use each of the tabs continue reading below.
Figure 2 - Group Seed Solver Tab Overview
This Group Seed Solver tab expects you to add two consecutive Pokémon files from your target spawner to resolve your group seed, to understand how to use this tab you will first need to learn how to advance the RNG state. The method used to advance the RNG state varies depending on the target, but everything will fall into one of two categories:
Includes: Uxie, Mesprit, Azelf, Heatran & Cresselia
These Pokémon are tied to story quests, which means that they will immediately respawn when knocked out, to respawn any of the Pokémon in this list do the following:
Includes: Phione, Manaphy, Shaymin, Darkrai, Tornadus, Thundurus, Landorus & Enamorus
These Pokémon require extra effort to respawn, they will disappear from the map once you knock them out, to respawn any of the Pokémon in this list do the following:
Figure 3 - Group Seed Solver Tab Usage
.pa8 file from the bot (typically found in your Discord private messages)..pa8 file contains the information the seed solver needs to determine the group seed of our target spawner..pa8 files.Group Seed Solver tab of ParLiAment, select the two files you just obtained from the bot and click Calculate Group Seed.Copy to Overworld Legendary (Spawner) Tab.Figure 4 - Overworld Legendary (Spawner) Tab Usage
Once you have obtained your matching group seed from the spawner seed solver you can then move back to the Overworld Legendary (Spawner) tab. Here is where you will search for upcoming target Pokémon on your seed.
0-indexed Seed checkbox is ACTIVE.SearchDepth of 10-100 depending on the rarity of your target.If you do not find any results or do not like your seed, you will need to head back to Jubilife and repeat the process of resolving your group seed again. Do this until you find a desirable result.
Figure 5 - Target Found
A target Pokémon that matches our desired conditions has been found! In this case we have found an Enamorus with 0 speed in 3 advances. We can now advance the RNG state using the method described above until we reach the desired state.
Search, you should now see every frame leading up to your target, click the row you are currently on and follow along until you reach your desired target seed.Figure 6 - Result Found
| Icon | Weather Condition | Mark | Title |
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Normal Weather | — | — |
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Overcast |
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the Cloud Watcher |
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Raining |
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the Sodden |
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Thunderstorm |
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the Thunderstruck |
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Intense Sun |
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the Parched |
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Snowing |
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the Snow Frolicker |
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Snowstorm |
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the Shivering |
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Sandstorm |
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the Sandswept |
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Heavy Fog |
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the Mist Drifter |