"You're trying to apply logic to a game where toys of characters from unrelated franchises come to life and beat each other up with dazzling powers and eventually fight a giant hand."
That isn't canon tho. <.<
That was just the commercial.
It was the opening demo for SSBM.
I think even using the term "canon" for SSBM is applying too much thought to the setting and story of the thing, which are essentially non-existent. The point is that this is not a game where consistency, internal logic, cohesive plot, or obeying physical laws are even matters of concern. It is entirely about having fun.