In Persona 5: Phantom X, you’ll need to find all 3 baseballs location in Kiuchi’s Palace to move forward through the Training Hall puzzles. These baseballs are all placed near the final rooms of the Training Hall, and if you check your map closely, they’re not too hard to find. Let’s check out where to find each one.
Where to Find All 3 Baseball Location in Kiuchi’s Palace

I marked all the 3 baseballs’ locations in the above image to help you find them easily in Kiuchi’s Palace.
The first baseball you need is the blue one. Head to the Training Hall and look for a glove-shaped machine blocking a small area. Smash two gates using your melee attack or the baseball shooter device. After that, you will see the blue baseball behind the glove. It is easy to find once the gates are open.
The purple baseball is close to the blue one. From the blue baseball spot, go to the next door. Jump on a gate nearby. Wait for the moving path to come. Cross the path and you will find the purple baseball behind a purple glove. This one is simple to get.
The last one is the gold baseball, which is a bit more hard to find. Look for a super boss in the Training Hall area. Climb up to the platform behind this boss. The gold baseball is right there. If you like to explore, you will not miss this spot. Just remember to check behind the boss and climb up to reach it.
Placing the Baseballs and Finishing the Puzzle

Once you have all 3 baseball, head back to the final room in the Training Hall. Place each baseball in its matching slot.
This unlocks the next area and gives you the golden card, which you need to move forward. The map marks these baseballs with a yellow check, making them easy to find if you use your Third Eye skill.