If you go into 3-D mode while in the coffee shop in Flipside B1, you can access a gold pipe that will take you to an arcade where you can play three different arcade games using different functions of the Wii remote, winning prizes for top scores. A fourth game can be unlocked if you have a Gold Card (obtained in the Flopside Milk Bar by going 3-D and opening a treasure chest).
Infinite Experience Easily
Need to get a level up, but keep dying in the Pit of 100 Trials? Then if you’ve beaten Chapter 5 (The one with the Crags and the Sapiens) go back to 5-4. Remember that pipe that just kept on sending out annoying Sapiens? Just jump on the block right next to it, then use Bowser’s flame, and he just keeps killing the Sapiens, because they just keep coming out, that’s 500 experience every 3 or 4 seconds and 10,000 or 7,500 every minute! (NOTE: This has been corrected in the PAL version)
Inifinite 3D with Mario
Beat Flopside Pit of 100 Trails twice and get Mario’s Card. This will allow you to go in 3D for as long as you want.
Easy infinite money
In order to do this you need at least 50 coins. Head to Yold Town in Chapter 1-2 and purchase a Life Shroom. Return to Flipside and make your way Saffron in F1. Use the Life Shroom to create a Roast Shroom Dish that sells for 96 coins at any shop. That’s a 46 coin profit! Simply, rinse and repeat the process until you have enough coins.
Items and stages
How to Unlock
Extra Mini Game in the Flipside’s Basement
Get the Golden Card
Flipside’s Pit of 100 trials
Beat Chapter 1 and unlock the outskirt in Flipside