i would like to make a pet Galactic. I know i need certain crystals or stones to make them. were do i get them. can i buy in players shops. willing to do so. were do i go to use the crystals? Also if say my pet is clawson and i want a Aynu galactic. i have to use a aynu potion first. then make him active and then go were ever?

To make a galactic pet, you need to visit Iltallo. You can manually find him in the Coda Caves (located in Atebus on the map). Select the pet you want changed. You'll need to turn in coda caves crystals (black, blue, green, dream, orange, red, white, yellow), which you can mine in Coda Caves. Here's the list for visuals: Coda Caves Crystals

Note: The Coda Caves is only open for mining on the 6th and 7th of each month, but you can also buy the crystals in user shops (they're relatively cheap).

And yes, if you want an Anyu (or other pet) galactic, first use any random anyu potion to change your pet into that species, and then go visit Iltallo for the blessing.

The items that turn one species of pet into another species (and also necessarily some specific color) are called Elixirs not potions. Potions change color only.

If you happen to want the natural color of the new pet choose the color Common.