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oval stones can be given to happiny and if it is holding it and if you treat it nicely it evolves into a chansey.
The Oval Stone is an item in the Pokemon games which can be used to evolve certain Pokemon. For example, it can evolve Chansey.
One can tell the difference between the oval, and rectanglular ;port heads, just by looking at the intake.
for hapinny to evolve into a chansey
terrine