Why has the price for the Glade Potion suddenly shot down after the release of new Glade pets? Shouldn't it, errr, go UP? XD

The glade potion is going to keep falling as everyone is making one for the achievement. Since it's a color you can zap only a few people are going to buy the pre-made potion.

Do you actually get anything for achievements or is it just the joy of achieving?

Just the joy really. There's a high score list but no real benefit other than to relieve boredom.

XD Thanks.

where do you go to create a glade potion?

Fill the Ornate Floral Pitcher at Peka glade while it's open. -8am/pm Subeta time.

The more anticipated/popular a specie is...the higher the price will jump. ;)

For the record, I paid mine 20.3 after the release.

When you go to Peka Glade, it technically fills the Pitcher with water and makes the Glade Potion. :)