Yes, you can potentially have unlimited. Whatever your computers memory can hold.
From what I know it is not possible to have more than 3 save files on Twilight Princess
Pfft. Every good game can have multiple save files, of course you can!
The download for Minecraft for the PC is around 300kb. Installed, it will be approximately 30 - 40 mb depending on how many save files you have. It is not any bigger than an audio CD.
To save space ! Compressed files occupy much less space than uncompressed files, enabling you to store more data in the same space.
Yes, you can have multiple characters on Xbox 360 by putting them on different save files.
You can have three save game files on Dragon Quest V for the DS.
D
imposible
If you choose to save as a html file than it will else it will save as the file type you told it to.
Minecraft is definitely less popular than roblox
Yes, you can change your Minecraft skin more than once. You can change your skin on Minecraft every week, every day, or every hour if you wanted to do it.
That is a question of opinion. I personally think Minecraft is better than Maplestory. But you have to be the judge of that.