She is in Celestic town. Fight the Galactic Grunt protecting the ruins in Celestic Town and Cynthia's grandmother will appear.
in celestic town
December
5'7
After Cynthia gives you the Secret Potion, use it on the group of Phyducks near the Cafe Cabin. Follow that route (210) until you get to Celestic Town. Talk to the Galactic Grunt and go inside the cave in the middle of the town. If my memory serves me right, she should meet you inside.
Cynthias grandmother lives in the largest house in celestic town right above the cave.
celestic town
You don't have to see her afterwards.
nothing
She is in Celestic town. Fight the Galactic Grunt protecting the ruins in Celestic Town and Cynthia's grandmother will appear.
Talk to Cynthias grandmother and find the stone that she tells you to find in mt. Coronet then go to spear pillar.
Cynthias grandmother is in Celestic Town. It is very near Solaceon Town, and it is on the edge of Mt. Coronet (opposite Eterna City).
by flying there with reshiram and lugia which you find on route 112 with the pokerader which you get when you give cynthias grandmother a shell bell
Cynthia's grandmother gives it to you.
in celestic town
December
You must battle heatran, talk to the lady in celstic town, then get the 2 orbs in mount corenet, then they should appear