"The Grand Finale Ver. 2 - Super Smash Bros. for Wii U" is a high quality rip of "The Grand Finale Ver. 2" from Super Smash Bros. for Wii U.
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There is no track titled "The Grand Finale Ver. 2" in Super Smash Bros. for Wii U.
This is an arrangement of "The Grand Finale" from Mario & Luigi: Bowser's Inside Story, using traditional Japanese instruments, such as a shakuhachi and shamisen. This references the track "King Dedede's Theme Ver. 2" from Super Smash Bros. for Wii U, which is a remix done using this style of instrumentation (to fan approval and amusement).