Super Mario Odyssey Producer Yoshiaki Koizumi has sat down and answered some of the big questions around Super Mario Odyssey.

Nintendo recently released a video with Koizumi answering tough questions about the hit platformer, including why Mario doesn't have a belly button, whether or not Toad's wearing a hat. He even touches on Mario's love life.

"So, we're jumping right into that question, are we?" he quipped when the video opens with a question about the lack of Mario's belly button.

"Well, to be perfectly honest, I didn't really expect that to be a topic among fans." Koizumi explained, adding "Once I heard that people were talking so much about Mario's belly button, it made me start to think about whether we should revisit the topic on the design side".

He then addressed a question which has plagued Nintendo fans for years — does Toad wear a hat?

"So that, as it turns out... is actually Toad's head. I'm going to have to leave it to all of you to figure out exactly how that works out. Maybe there's something inside," he ominously teased.

And when it comes to commenting on Mario's relationships with Peach and Pauline, Koizumi isn't confirming or denying anything.

"I would appreciate it if we could respect the privacy of those three at this time," he said.

If you have questions about Super Mario Odyssey such as, "Where are all those power moons?" or "How can I beat the Koopa races?" make sure you check out our Wiki Guide. On the other hand for questions that aren't being answered, Nintendo isn't telling who's making Labo.

Hope Corrigan is an Australian freelance writer for IGN who just thought Mario's pants covered his belly button... You can follow her on Facebook, Twitter, and Twitch.