When I play this game, it has some of the most weirdest glitches I've ever seen. Weirder than Melee's. : S You can glitches you've found, here. I'll tell you some of the glitches I've found.
~CPU Level 9 Mine Platform Glitch~
Stage: The ones that have the 'go through' platfroms
Character(s): Snake
1. Do the Down Smash attack & stand on the edge of the platform.
2. If the CPU didn't hit the mine, it will continuously shield roll on the edge of the platform.
~Lucario's Aura Sphere Sucker~
Character(s): Lucario
1. Have 2 Lucarios on the same team
2. Have 1 (Or 2.) opponents on the other team(s).
3. At a stage, make them walk and have the Lucarios right again each other.
4. Turn the Lucario that's facing right to the left, and vice versa with the other Lucario.
5. Press B.
6. When the Aura Sphere's fully charged, let the opponent(s) go into the Spheres.
7. They will be sucked into the spheres.
~Captain Falcon's Starman Final Smash Glitch~
Character(s): Captain Falcon
1. Have the items on, including Starmans and Smash Balls.
2. Have Falcon get both a Starman & a Smash Ball.
3. While he's invincible, use his Smash Ball on an(the) opponent(s).
4. The opponent, somehow, has the Starman.
5. After it ends, if you did the FS quickly enough, Falcon wills still be invincible for a little bit.
That's all, for now. I'll post more when I remember them again. : )