Is it possible to raise the power of Hidden power?

Question

Becuase my Jolteon has HP ice but it doesn't do much damage even when super effective.

Answer 1

No, you can't change the power on an already caught Pokemon. The power is based on the IVs which are set as soon as you encounter/receive it.

So the only way is to breed a load of Eevees and test HP on each one :(

Comments

And keep in mind that the max power for Hidden Power is only 60 I believe.