How To Gain Infinite Coins in New Super Mario Bros. Wii! (Additional 1UPS Included) Head to World 4-Castle (You’ll need an Ice Flower for this attempt) and pull up at the flippable fences. Climb with the Koopas and target one of them. Step 1: Press 2 to jump. Step 2: Press 1 to freeze a Koopa. Step 3: After that, press UP (D-Pad) and punch the fence before the now frozen Koopa hits the floor. Infinite coins will now spew from the iceberg. But, if you wander around too long, the game will result in a lag. Make sure to Like, Comment, Share, and Subscribe to EmoDweeb2008 for more videos!