What is the value of a secret base in Ruby?

Question

I know you can decorate it but what else is it good for?

Answer 1

It is used to EV train by mixing records with your friends and battling their team in the secret base. And the decorating is cool.

Comments

Thanks for that Trachy.  Sadly I don't have anyone close by to battle.  I'm very limited due to only having a GBA SP.  That probably explains the different bricks and muscial note mats I can buy.