Nintendo has said its going to put its beloved characters on smart devices.
It's exciting news for gamers, but here are the things I want to see from Nintendo's gaming apps.
First do in-app payments right.
Nintendo's game apps could well be like Candy Crush, free to download, but then charging you for in game items.
Some free to play games make it way too hard to progress without paying real money.
But others like Blizzard's Hearthstone earn cash for their makers and are still fun for gamers who never spend a penny, because the advantages that real world money gets you are limited.
Nintendo needs to strike that balance.
Secondly, don't kill the console.
Nintendo's history lies with dedicated gaming machines.
That by making mobile games it runs the risk of removing any temptation to buy its bigger, expensive home systems.
Nintendo needs to make its mobile games great but ensure its consoles still offer something different.
Otherwise, it could end up in trouble.
Thirdly, think about the medium.
Phones and tablets are different devices to consoles and handhelds.
And Nintendo needs to make sure its games are suited to them.
Nintendo's already said it won't be porting console games to mobile, which is a good start.
The great control without physical buttons and games that work for quick 30 second bursts of gameplay.
Are a must.
Nintendo has plenty of great franchises, but mobile gamers could feel ripped off if they're denied Nintendo's most famous characters.
We want to see Mario, Zelda and Metroid on smartphones.
So, Nintendo has its work cut out, but it has the power and the personality to create the best mobile games around if it wants to.
Don't let us down, Mario.