You can play Episodes through [BATTLE] which is at the bottom right when you start the game.

Through the 3 difficulty levels of Episodes: 

Easy, Normal, and Hard, you can obtain Dollars.

Here's how to play Episodes.

■ How to play Episodes

[LOBBY] -> [BATTLE] -> [EPISODE] -> Select [EPISODE] -> Select [STAGE] -> [Select Difficulty] -> [START]