Pokémon Legends: Arceus doesn’t have things like IV’s, but there is a stat system that comes into play. Typically, bigger Pokémon are the more powerful ones in the games. Sadly though, it can be hard to tell which one of your Pokémon is the largest unless you know where to look.
Figuring out the size of your Pokémon is rather easy. If you want to check the Pokémon already in your party, press the up button and move over to your Pokémon. Press A and then select check summary. Here you can see the height and weight of a Pokémon.
If you want to check the Pokémon in your pasture, you will need to apply the same method. Either speak to the camp NPC to look at your pasture Pokémon or speak with the lady out front of the pasture in Jubilife City. Once in, simply hover over your Pokémon and choose to view their summary.
If you have multiple of the same Pokémon, go to the first one in a line and click summary. From there, you can use the up and down buttons to sift through them.
To learn more about Pokémon Legends Arceus, check out How to Beat Volo at the Temple of Sinnoh | Pokémon Legends: Arceus on Pro Game Guides!
