Here is the full list of all 16 Topac Battle Demo achievements.
Collect all classes of Topacs!
Enter a battle with at least 3 Shiny Topacs!
Open 100 Basic Balls!
Open 100 Great Balls!
Open 1000 Basic Balls!
Open 1000 Great Balls!
Open 100 Master Balls!
Open 100 Topac Keeper!
Acquire 30 Topacs from battles!
Win 10 battles!
Win 1000 Battles!
Reach 100 park capacity!
Lose 10 battles!
Sell 100 Topacs!
Earn 500,000 XP
Raise 10 Shiny Topacs to Gen 3