Explain how each one happened....
Okay, here goes...
Marth: Really simple and nothing special, just turn camera a little when doing double jump.
Snake: When Harberd shoots the giant lazer use Cypher and Snake will stop because super armor protects he from flinching while he´s still taking damage. By turning the camera inside the lazer the world turns blue.
Bowser: He was throwing Pikachu when Jeff shot Pika with a rocket, releasing him. This is how bowser reacted.
Link: He was hit by Ganondorf´s FS and I paused when he was about to fly off the screen.
White screen: I don´t remember wich one, but one FS turns everything completely white for a very short moment. (might have been Galaxia Darkness)
Cratpain Falcon: This is indeed a glitch. In SE, when a character died, I paused just before the next one (Falcon) appeared to the stage, causing his stock mark appear into the bottom-left corner. This mark moved anywhere along the pause screen, maintaining it´s position. It even was in the screen that asked whether I would like to save snapshot to wii or memory card. This caused game to work little slow at ties in pause screen, but completely fixed itself after I released pause.