Keldeo switches forms through a specific research task, not through items or level-ups

Keldeo in Pokémon GO has two forms: Ordinary Form (its default state) and Resolute Form (unlocked after completing a special research task). You cannot change between these forms using items, evolution stones, or any menu option. Instead, you complete the "A Watery Grave" special research line, which teaches Keldeo the move Sacred Sword and transforms it into Resolute Form permanently.

The transformation happens automatically when you finish the final step of the research. Once Keldeo learns Sacred Sword, it stays in Resolute Form. You cannot switch it back to Ordinary Form afterward, so understand what you are choosing before you complete the research.

Key Takeaways

  • Keldeo changes to Resolute Form only by completing the "A Watery Grave" special research task, which teaches it Sacred Sword.
  • The form change is permanent — once Keldeo becomes Resolute Form, it cannot return to Ordinary Form.
  • You must have caught Keldeo in Ordinary Form first; the special research becomes available after you own one.
  • Resolute Form Keldeo has the same stats and combat power as Ordinary Form, so the change is cosmetic rather than a power upgrade.

How to start the "A Watery Grave" research

Open Pokémon GO and tap the binoculars icon at the bottom right to access the Research tab. Scroll through your available special research tasks. If you own a Keldeo in Ordinary Form, "A Watery Grave" should appear in your list. Tap it to begin.

If you do not see the research, you either do not own a Keldeo yet, or the research has not been released in your region. Keldeo was first distributed through special research in 2022, and Niantic has re-released the task during certain events. Check the in-game news or the official Pokémon GO social media accounts to see if the research is currently available.

What the research tasks require

"A Watery Grave" is a multi-step research line with tasks spread across several stages. The tasks typically ask you to catch Pokémon of specific types (usually Water-type), win battles, or walk a certain distance with Keldeo as your buddy. None of the tasks require spending Poké Coins or real money.

The research does not have a time limit, so you can complete it at your own pace. You can pause and resume whenever you want. Work through each stage in order — you cannot skip ahead or do stages out of sequence.

What happens after you complete the research

When you finish the final stage, Keldeo automatically learns Sacred Sword and transforms into Resolute Form. The change happens when ready in your Pokédex and in your storage. You will see a notification confirming the transformation.

Resolute Form Keldeo has identical stats, CP, and battle performance to Ordinary Form. The only difference is visual — its appearance changes, but its power in raids, gyms, and PvP battles remains the same. This means you are not gaining a competitive advantage by changing the form; you are purely changing how it looks.

Whether you should complete the research

If you like how Resolute Form looks, complete the research. If you prefer Ordinary Form's appearance, you can keep your Keldeo as is and never start the research. Since the form change is permanent and offers no gameplay benefit, your choice comes down to which design you prefer.

Some collectors keep one Keldeo in each form by catching multiple Keldeo and transforming only one of them. This requires patience and luck, since Keldeo is not available in the wild — it only appears through special research or special events.

If you cannot find the research

The "A Watery Grave" research is not always available. Niantic releases it during specific events or as a limited-time special research. If you do not see it in your research tab, the task is not currently active in your region.

Check the in-game news section (the envelope icon at the top left of the main screen) to see if an event featuring Keldeo is running. You can also search online for "Pokémon GO Keldeo research 2024" or check the official Pokémon GO blog to find out when the research might return.

Frequently Asked Questions

Can I change Keldeo back to Ordinary Form after it becomes Resolute?

No. The form change is permanent. Once Keldeo learns Sacred Sword and becomes Resolute Form, it stays that way. You cannot undo the transformation, so think carefully before completing the research if you are unsure which form you prefer.

Does Resolute Form Keldeo perform better in battles?

No. Both forms have identical stats, CP, and move pools. Resolute Form is purely a visual change. Your Keldeo will perform exactly the same in raids, gym battles, and PvP whether it is in Ordinary or Resolute Form.

What if I lose my Keldeo before finishing the research?

If you delete or trade away your Keldeo before completing "A Watery Grave," the research stays in your task list but becomes inactive. You will need to catch another Keldeo to resume it. The research does not disappear — it waits for you to own a Keldeo again.

Can I get Keldeo without doing the special research?

Yes. Keldeo appears in special events, field research tasks, and occasionally in raids. You can catch it through these methods without ever touching the form-change research. The special research is only needed if you want to transform it into Resolute Form.