Question 4: I Can't Remove My Helmet

Toshiba: You see, my kingdom is enveloped by a gigantic bubble type thing that keeps our air in. The only time I can remove my T.V. helmet is when I'm back home. Ooo doesn't have regular air.
After the great mushroom war, Oxygen slowly started to perish. That's why you guys have black dots for eyes, 4 fingers and no nose. You slowly started to adjust to the new air, it's kinda like evolution in a way.
But I on the other hand have 5 fingers, human eyes and a nose. Don't worry, I'm sort of half human half robot. I have a human heart, but it's powered by cords inside my body. That's why I have to charge for about 10 hours....basically sleep, like you guys.
I know it's a little confusing, but the T.V. people here are very smart. We study these things.

[[I know it's over the top, but it's an actual theory I made up for the show. I've noticed that in movies with aliens, their air is different from earth, so they usually have 3 or 4 fingers and two holes in their face that supposed to be a nose.
I just put the two together. I swear, if the show actually has a theory similar to mine, I want you all to know I had no idea. xD Also, this is just a theory I made up, Adventure Time is not very clear on these things, so I'm trying to relate to the show as much as possible.]]