Question about item-cheats and possible online bans

[BlueberryPie]

Hi guys,

I would like to mod my Wii to be able to cheat items for my offline shortcut trainings which would save much time obviously. I have never done anything like that and it will be my first try. I will use the guide in the forum here.
But before I start I am concerned about a possible online ban because of that. I don't want to use them online and just for training reasons. Are there any dangers? What should I put attention on?

Thanks in advance