Ultimate BDSP Feebas Calculator – Find Feebas Instantly


Ultimate BDSP Feebas Calculator


Find your daily lottery ID by talking to the receptionist at Jubilife TV.


What is a BDSP Feebas Calculator?

A bdsp feebas calculator is an essential tool for players of Pokémon Brilliant Diamond and Shining Pearl who want to catch the elusive Pokémon, Feebas. In these games, Feebas has a unique and notoriously difficult capture method. It only appears in a large, foggy lake on the basement floor of Mt. Coronet, and even then, it will only spawn on four specific water tiles.

These four tiles change every day, making a manual search incredibly time-consuming. The specific tiles are determined by a pseudo-random number generated by the game, which is linked to your daily Lottery ID from the Jubilife TV station. This calculator automates the process by taking your Lotto ID and performing the exact same calculation the game does to reveal your four personal Feebas spots for the day, saving you hours of frustration.

The BDSP Feebas Formula and Explanation

The logic behind the bdsp feebas calculator is based on reverse-engineering the game’s code. Both the Feebas tiles and your daily lottery number are derived from a hidden value known as a “group seed.” While we can’t see this seed directly, we can work backward from the Lotto ID.

The formula is as follows:

  1. The game determines your daily Lotto ID from your group seed.
  2. The calculator takes your Lotto ID and reverses the calculation to find a part of that original seed (specifically, the lower 16 bits).
  3. Because the upper 16 bits of the seed remain unknown, there are two primary possibilities. This is why the calculator generates two sets of tiles (Green and Red). One of these sets is guaranteed to be the correct one for your game on that day.
  4. Each of the four tiles in a set corresponds to one of the four bytes of the full 32-bit seed value, which is then mapped to a specific coordinate in the Mt. Coronet lake.
Variable Explanations
Variable Meaning Unit Typical Range
Lotto ID The 5-digit number from Jubilife TV. Unitless Number 0 – 65535
Group Seed A hidden 32-bit integer that changes daily. Unitless Number Full 32-bit range
Tile Coordinate An (X, Y) position on the lake grid. Grid Position (0,0) to (25,17)

Practical Examples

Let’s see the calculator in action with two examples.

Example 1: Lotto ID 29712

  • Input: 29712
  • Results (Green Group): (4, 1), (13, 13), (1, 14), (20, 1)
  • Results (Red Group): (4, 1), (13, 13), (18, 11), (2, 7)
  • A player with this ID would find that Feebas spawns on either the four green tiles or the four red tiles. A quick test on one tile from each group will confirm which is active.

Example 2: Lotto ID 62744

  • Input: 62744
  • Results (Green Group): (20, 9), (7, 13), (2, 10), (12, 1)
  • Results (Red Group): (20, 9), (7, 13), (10, 8), (25, 6)
  • In this scenario, the player would check a tile like (20, 9). If Feebas is there, they know the green group is correct. If not, they move on to the red group tiles.

How to Use This BDSP Feebas Calculator

  1. Get Your Lotto ID: Fly to Jubilife City and enter the Jubilife TV building. Speak to the woman at the front desk to play the Pokémon Lottery Corner. She will tell you your daily lottery number. Write it down.
  2. Enter the ID: Type the number into the input field at the top of this page.
  3. Calculate: Click the “Find My Feebas Tiles” button.
  4. Check the Map: The tool will instantly highlight two sets of tiles (four green, four red) on the Mt. Coronet map.
  5. Go to Mt. Coronet: Enter the Mt. Coronet cave system (the Celestic Town entrance is closest) and navigate to the large, foggy underground lake. You will need the Defog HM to see clearly.
  6. Test a Tile: Go to one of the colored tiles shown on the map (e.g., a red one). Use a Good Rod or Super Rod and fish 5-10 times.
  7. Confirm the Group: If you find a Feebas, you’ve found your active group! All four tiles of that color will have Feebas. If not, switch to the other color group and repeat.

Key Factors That Affect Feebas Fishing

  • Daily Reset: Your Lotto ID and corresponding Feebas tiles change every day at midnight based on your console’s clock. Yesterday’s tiles will not work today.
  • Correct Rod: You must use either the Good Rod or the Super Rod. The Old Rod will only ever catch Magikarp.
  • 50% Encounter Rate: Even on a correct tile, Feebas only has a 50% chance of being hooked on any given cast. The other 50% will be Magikarp or Barboach. Don’t give up after one try!
  • Unfishable Tiles: In rare cases, the game’s algorithm can place a “Feebas tile” on a square that is actually land. The calculator will show this tile, but you obviously cannot fish on it. This is a bug in the original game, not the calculator.
  • Precise Positioning: The lake grid can be tricky. Make sure your character is standing adjacent to the target tile and that your fishing bobber lands directly on it. Using the D-pad for precise movement is highly recommended. For more details on game mechanics, check out a complete Pokemon Brilliant Diamond Shining Pearl walkthrough.
  • Player ID vs. Lotto ID: Do not confuse your 6-digit Trainer ID with the 5-digit daily Lotto ID. Only the Lotto ID from Jubilife TV works for this calculation.

Frequently Asked Questions (FAQ)

1. Where do I find my Lotto ID?

In Jubilife City, inside the Jubilife TV building. Talk to the receptionist at the main counter.

2. Why are there two sets of colored tiles (Red and Green)?

The Lotto ID only gives enough information to narrow the possibilities down to two potential sets of tiles. One set is always right, the other is always wrong. You must test one tile from a set to find out which is your active set for the day.

3. What if I missed my Lotto ID number for today?

Unfortunately, the receptionist will not repeat the number. You will have to wait until after midnight for a new number and a new set of tiles.

4. I fished 20 times on a colored tile and didn’t find Feebas. What’s wrong?

First, ensure you are on the correct tile and that your bobber is landing in the right spot. Second, try the other color group. If you’ve tried a tile from both the red and green groups and found nothing, double-check that you entered the Lotto ID correctly.

5. Can I use someone else’s Lotto ID?

No. The tile generation is tied to your save file’s unique hidden seed, which is what the Lotto ID is based on. Another player’s ID will not work for your game.

6. Does the rod I use matter?

Yes. You must use the Good Rod or Super Rod. The Old Rod cannot catch Feebas. You can find strategies for getting items in our BDSP tips and hints guide.

7. Why is one of my Feebas tiles on land?

This is a known bug within Pokémon BDSP itself. The algorithm that picks tiles doesn’t exclude a few land-based squares, making them invalid fishing spots. You simply have one less tile to fish on for that day.

8. After catching Feebas, how do I evolve it into Milotic?

To evolve Feebas into Milotic in BDSP, you must raise its “Beauty” condition. You can do this by feeding it Dry Poffins, which are made from blue-colored berries like Chesto, Oran, or Pamtre berries. Once its Beauty is high enough, it will evolve the next time it levels up.

Related Tools and Internal Resources

Expand your Pokémon BDSP journey with these other helpful guides and communities:

This calculator is an independent tool created for Pokémon fans and is not affiliated with Nintendo or The Pokémon Company. Game data and mechanics are based on community reverse-engineering of Pokémon Brilliant Diamond & Shining Pearl v1.1.1. For the latest game news, visit the official Pokémon website.



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