You can do this by using the ‘Purely Random Items’ code. It’s one of the base codes you can get from either using Gecko codes on Dolphin Emulator or using Honebrew (I believe) or an Action Replay disc on real hardware.
1. I believe you can use the code on the Wii with Homebrew, though I never tested that myself so I’m not entirely sure. 2. I added the code in the description of the video. (May change it just in case though)