Preliminary
This tool can predict upcoming Battle Tower opponents, what Pokémon they will have, which one they will lead off with, and what abilities they will have.
This tool works for the Battle Tower only, and only for 4th generation games (Diamond, Pearl, Platinum, HeartGold, SoulSilver).
Diamond and Pearl versions use a different dataset of possible trainers and Pokémon than Platinum, HeartGold, and SoulSilver versions. Additionally, they have a bug which causes the natures of opponent Pokémon to be incorrect.
This tool works because the 4th generation games' Battle Tower does not use the standard RNG for its opponent trainers; it instead uses a fixed group-synced RNG. This means multiple players in the same group will have the same sets of opponent trainers. A friend could therefore tell you in advance which trainers they fought, which Pokémon they had, and so on, and your game would produce those same results.
This tool is simulating syncing to your group and running the Battle Tower's opponent trainer generation. This could equally be accomplished on original hardware by mixing records with another game and playing the Battle Tower there.
Daily random seed
Click here for the daily random seed calculator.
The daily random seed controls daily random events such as the swarming Pokémon and the Lottery Corner numbers. It changes day-to-day in a predictable manner. It is responsible for the Battle Tower trainer generation.
The daily random seed can be calculated with two sequential Lottery Corner numbers. Once you have it for one day, it can be calculated any number of days into the past or future.
If you join, leave, or form a group, or mix records, or alter your DS date or time, or play on a different DS than usual, your daily random seed may change, or fail to change when expected, and you therefore may need to calculate the daily random seed again.
Completed rounds
Completed rounds is the number of 7-trainer sets of the Battle Tower you have already beaten. The current streak on the monitors will show the total number of trainers defeated; divide this by 7 to obtain the number of completed rounds.
Note the completed rounds maxes out at 255. After 256 rounds (a streak of 1792 trainers), it overflows to 0, causing very early trainers with weak Pokémon to appear again. You do not need to account for this when entering the number of completed rounds.
Frame advances
Usually 0. Each daily random seed has multiple frames; each frame generates a different set of opponent trainers. After a new day rolls over, the daily random seed updates, and the frame is reset to 0.
The frame is advanced in two situations:
Continuing an existing streak does not advance the frame.
Note that all of the different Battle Tower challenge modes share this frame. That is, advancing the frame in doubles (for example) will also advance the frame for singles.
Wi-Fi mode never advances the frame.
If the frame has been advanced at least once, it is difficult to know which frame is current without trial and error. If the output of the calculator does not match what you see in-game, try incrementing the frame advances.
Player team information
If playing multi battle mode with NPC ally trainers, their teams are randomly generated while avoiding species clause and item clause with the player. This advances the Tower RNG, making it mandatory to provide this information to accurately predict opponent Pokémon.
Possible Pokémon and items that the NPC ally trainers may have are listed in dropdowns. Select "None of these" if none of them match your team.
Multi mode with friend
If playing multi battle mode with a friend over local connectivity, the daily random seed, number of completed rounds, and frame advances are all only relevant to the leader.
The number of completed rounds of the friend is important only if it is greater than the completed rounds of the host. In such case, it is used for trainer generation instead of the host's completed rounds.
If the guest is using Diamond or Pearl version, then the dataset used will always be the D/P dataset, regardless of which game is the host. However, Platinum, HeartGold, and SoulSilver will generate opponent Pokémon from this dataset having fixed the incorrect natures bug.
Output
If playing single battle mode, the Pokémon at the top of the list is the lead. If playing double battle mode, the top two Pokémon are the leads. If playing multi battle mode, the Pokémon at the top of the list for each trainer is their respective lead. The subsequent Pokémon after the lead(s) are fainted can appear in any order, subject to the trainer AI reacting to your team.
The game has a failsafe that replaces items if it is unable to make a team that does not violate item clause. This triggers extremely rarely if at all, but is accurately handled here.
EVs are distributed equally among each stat listed. If two stats are listed, each has 255 EVs; if three stats, each has 170 EVs; if four stats, 127 EVs.
Speed stats shown are including the trainer's IVs and held item modifiers, if applicable.
| # | Set | Held item | Ability | Nature | Moves | EVs | Speed | |||
|---|---|---|---|---|---|---|---|---|---|---|