Mario Bros

What is the font used in the logos for Super Mario Bros, New Super Mario Bros, and New Super Mario Bros Wii?

What is the font used in the logos for Super Mario Bros, New Super Mario Bros, and New Super Mario Bros Wii?
Please answer as this:

I don't believe it has its own font. I think it was originally hand written and was then computerised, that's also how the Guitar Hero logo was written.

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