The Pokémon Center is an area where you can do things such as trading. It can be accessed via Sam and Dan's blog, the "Trading" button on the game menu and the "Inventory" button on the game menu.
There is also a warning to log out of Pokémon Tower Defense as it might corrupt data--if you open the Pokémon Center while playing PTD, the game will be unable to save.
In the Avatar Store you can buy different avatars using your SnD Coins.
Once a day, you can participate and try to win rare prizes.
Check your items and change your avatar for this profile.
Play the slots to earn rare Pokémon with a chance for them to be shiny.
Go here to select one of your Pokémon and put them up for trade. Other players will be able to request trades for your Pokémon. Once you put your Pokémon to trade, you will not be able to use him in your game unless you call him back.
Your Trade Request
Go here to see if anybody has requested a trade with you or if any of your request have been accepted. You can also call back your Pokémon if you don't wish to trade it anymore.
Go here to search for trades that other players have posted.
Remove Hacked Tag
Go here to remove the Hacked Tag from your Pokémon. The tag may be removed using 1 SnD Coin or 500,000 Casino Coins. 10 SnD Coins will allow you to remove the tag from all your Pokémon at once.
Elite 4 Black Screen Fix
Go here if your screen is going black when beating the Elite 4, this will unlock the champion level for you.
Transfer to PTD2
Transfer pokemon of Pokemon Tower Defense to Pokemon Tower Defence 2 in the Alpha v1.36