|Oval Stone Locations
|The Lost Tower—Inside a Poké Ball directly in front of the Youngster on the second floor
|Held item (50% chance) found on the following Pokémon:
There are only two ways of obtaining Oval Stones in Pokémon Platinum: one stone can be found in the Lost Tower, and you can also steal Oval Stones as held items from wild Happiny or Chansey.
Both of these methods become available as soon as you reach Solaceon Town at the end of Route 209.
Neither method is difficult, but the one-off Oval Stone inside the Lost Tower takes far less time to pick up.
Getting Oval Stones
Method 1: The Lost Tower (Step-by-Step)
The quickest way to get an Oval Stone is to find the one inside the Lost Tower.
No Hidden Moves are required to reach this Oval Stone, so you’ll have access to it as soon as you reach Solaceon Town.
To find it, start at the Solaceon Town Pokémon Center and leave through the southern entrance.
Head south down Route 209 for a short distance and you will see an obelisk structure to the east of the road. This is your destination, the Lost Tower.
Head down the stairs and enter through the front door.
There’s nothing to see on the first floor, so just head for the staircase in the northwest corner.
You’ll see the Poké Ball containing the Oval Stone as soon as you enter the second floor. It’ll be on the ground in the middle of the room near some tombstones.
Battle the Youngster trainer guarding the Poké Ball, then pick it up to add the Oval Stone to your Bag.
Method 2: Held Item on Wild Chansey and Happiny (Repeatable)
You can also find Oval Stones being held by wild Chansey and Happiny.
Of the two Pokémon, Chansey is by far the easier species to find in the wild.
In fact, Chansey can be found on Route 209—the same route as the Lost Tower from Method 1.
Wild Chansey also have a very high chance of holding an oval Stone upon each encounter (50%).
What makes this method a little more time-consuming is that wild Chansey are pretty rare, with only a 5% encounter rate.
You can slightly speed up this process by creating an optimized held item farming team, but it’s not totally necessary either.
These special teams use Pokémon with the Abilities Frisk and Compoundeyes to increase the odds of finding items and to identify any items being held with each encounter.
In this case, Compoundeyes will increase the chance of a Chansey holding an Oval Stone from 50% to 60%. And Frisk will alert you if each Chansey is holding an item at all.
When you’ve found a Chansey with an Oval Stone, either use a stealing move (like Thief or Trick) or catch the Chansey to obtain the item.
Then you’re free to end the battle however you prefer—you will keep the Oval Stone even if you flee.
Oval Stone Details and Uses
The purpose of the Oval Stone is to evolve Happiny into Chansey.
To make this happen, you’ll need to have Happiny gain a level during the daytime while holding an Oval Stone.
Evolving Happiny into Chansey
First, give an Oval Stone to your Happiny to hold.
Then you’ll just need to level it up during the Day.
Pokémon Platinum considers daytime to be between 10:00 am and 7:59 pm, according to your console’s in-game clock.
Happiny is woefully powerless in battle; so you’ll probably want to use an Exp. Share to level it up easier.
After one level increase, Happiny will evolve into Chansey. The Oval Stone will be consumed at this time.
Is Chansey Worth Using?
Chansey has an astronomical base HP stat of 250, and a decently high 105 Special Defense stat. This makes it a good choice for a team’s healer and trap-setter.
However, Chansey suffers from the lowest Defense stat in the game.
And it has almost no options when it comes to actually dealing damage.
These flaws can be somewhat mitigated by further evolving Chansey into Blissey via a high friendship level.