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Revelation Dance is listed as a Normal type move but becomes the user's primary typing which is why Oricorio's revelation dance becomes Electric/Fire/Psychic/Ghost when used as that is each form's primary typing.
So in the case of a typeless Pokemon, I would guess the move remains Normal type...
Seconding this as Banded V-Create is a very great wallbreaking move that can easily whittle down bulkier mons for teammates. Victini also has access to U-Turn to keep offensive momentum up against what it can't hit well like Heatran and Victini pairs very well with mons like Mega Lopunny and...
I feel as a result of recent tier shifts and the departure of Mega Pidgeot and Gligar to UU, it seems as though the RU tier will have a rise in the usage of strong Fighting types.
Because of these two Pokemon leaving and the probable rise of strong Fighting type Pokemon like...
Shout-out to Focus Sash Scolipede for forcing in Gengar/Giratina-O/Priority Users/other Defoggers
This was the first suspect I took place in and was actually pretty fun outside of those Evasion Baton Pass teams which played the same way every time with Taunt Gengar and Lum Berry Espeed Arceus.