I never played a pro before but rollout is an extreme fun move to rack up kills online FFA. I love using it most when players(noob players and theres plenty of them) nearly knock me off to my death, then i rollout either when im high enough or on the side of the map where the viewport of the game cannot see the character. Then I come back knocking the enemy's lights out. Its funny when I rack up enough kills and players start seeing rollout as a threat when used in the edge of the map, then they start to only aim for that ****ing jigglypuff. Then I see them charging their smash and I aim the rollout for the ledge, thus the opponent misses my jigglypuff and I see the frame lag after their smash and do an 11% unescapable ledge attack(where I drop down, jump, and double kick em to da face!).
The moral to this story is that not every player has catlike reflexes to dodge a fatal blow of the rollout. Even if they do, the game does not have the cheat code to reduce its frame rate of vunerability and magically dodge a rollout. When rollout is abused then the player has knoledge to use the reflexes to tell their character to jump, dodge, or attack the noobish jigglypuff player. When you get your enemy to be aware of the rollout, then your enemy will probably change way of approching your gameplay. Therefore, it opens up new ways of attacking your enemy because they are focused on rollout. Mindgame.