From PokéHeroes Wiki
Resolute Stones can be used to obtain a Keldeo
How to find them
How to use it
A Resolute Stone can only be used if you have purchased the Legendary Egg Chip from the Item Shop. The Egg Chip can be used at the Tall Grass, and will allow you to find a Keldeo egg.
- Resolute Stones are tradeable
- Hatching a Keldeo egg will count towards your shiny chain.