Alfonzo Bagpipez
Smash Lord
As someone who plays Pichu in tourney, can confirm this is incorrect.I did play the game... And I did that stuff. Pichu the character with the worst range was safe on sheild with aerials. I could sh nair lcancel and then grab jab uair or nair again before my opponent could do an offensive option. assuming it wasn't bowser or samus.
Their only options were to roll away, wavedash out, spot dodge or (what most people would do) hit me before I got to their sheild.
Even slow dudes like gannondorf could dair and fair on sheild Lcancel and have their jab to shut up offensive actions, even if their spacing was WAY off.
EDIT:
And you don't even have to commit to THOSE options, you can wavedash or just run away after a successful lcancel as well.
Unless you cross-up, Nair isn't completely safe on shield. Even if you do cross-up, fast bairs or shines can get you.