Change slot patterns and increase difficulty (2-players)
When you enter the two-player mode menu, hold Up and press Start. This will change the slot patterns in the game, and also increase it's difficulty.
Change the slot patterns
At the title screen press B five times, then A three times, then hold Up and press Start. If done right, the patterns in the slots will be changed and the game will be harder.
Level select
At the title screen press B five times, then A three times, then hold Down and press Start. If done right, you'll be able to select all levels.
