[Wii] New Super Mario Bros Wii - "Ending"

[videogaminglegodude]

OK, I need help with this arrangement.  I have gotten about as far as I can, but am unable to finish it.  Help wanted!

Thanks in advance.

(Skip to 3:16)

My work so far is included below.

[videogaminglegodude]

Actually, this is not a joke.  Nor did I get the time incorrect.  I am completely serious.  The tune that plays when you rescue...magikoopa?  yes, that one!

[Bloop]

It's a little variation of the ending theme of the first Super Mario Bros.

[videogaminglegodude]

It's a little variation of the ending theme of the first Super Mario Bros.

I understand.  however, it is still unique enough to be its own arrangement I think.  after all, where in the SMB version do you hear an all out "grind-down" type of measure?