It is in the right (east) wing, on the third floor to the right of MacGuffin's and Good Deals.
He crawls away, but you get another phone call and then the security camera image goes off. Go to the Carnival Costumes store to investigate.
After he knocks you down in the Carnival Costumes store, go to MacGuffin's and hide there. When he enters, you can surprise him. He gets away, but drops a key marked 'back room.'
There is no way to have a bat follow you on any island. This may be an idea for the costumes at the Store.
You receive the Island Medallion and 100 credits toward costumes, passes, and other items at the Poptropica Store.
If you are using the Costumizer, you can't store appearances. You will need to get them again from other characters. (doesn't work anywhere on Big Nate Island) As of June, 2009, you can BUY permanent costumes from the Store.
There are costumes and effects available from the ad mini-games, from the island quests, and from the Poptropica store.
Left (west) wing: 3rd floor - PrintFax / Giuseppe's Toys 2nd floor - In the Now / No Pain No Gain 1st floor - Crawl Mart / Jolly Gifts Atrium - food services, manager's office, security office Right wing: 3rd floor - MacGuffin's / Good Deals / Carnival Costumes 2nd floor - Slugger's Keepsakes / Slumber Town 1st floor - (empty space) / Sizzle tanning (see the related image link below)
"Costume Express" is one of the most common stores in the states. You can purchase costumes at "Costume Express" in store or online. Costumes are also available at your local department store.
The costumes have no effect on the game play, and you don't have to wear one. You DO need the Superhero ID from the Masks and Capes store, in order to visit the Prison as an "official superhero".
You can probably go to a costumes store or order them online.
Cupcake costumes are available. WalMart is a store that sells many items online. You can purchase a costumes from WalMart and they will have it delivered to the store for free or to your home for a nominal cost.
To find wizard of oz costumes, you may search their costumes on their own website. Depending on where you live, if you have a Target store around you, you may want to try to visit their store and find the costumes.