1) Mr. Mime doesn't protect a Bench-sitter like Electrode from being promoted by Escape Rope unless you choose to send up the Mr. Mime in place of it. I wasn't giving a universal rule but addressing a specific idea; running small Bench-sitters because now they are safe(r) from Pokémon Catcher. The concept was if you were having multiple on your Bench - if you can make a single work, Escape Rope was only an issue if that was your sole Benched Pokémon. If the Bench-sitter has already served its purpose/is the least valuable Pokémon to retain, again this is a non-issue.
2) I did forget about Mr. Mime. The good news? It will definitely block spread/snipe damage. The bad news? That's another smaller Pokémon that eats up Bench space, and again I was talking about running a supporting Pokémon in multiples. So... do you have room for a deck that plans on having (for example) two copies of Electrode and a Mr. Mime on the Bench? That's half your available space in play for Pokémon. Not what the post I initially responded to was about? Then I was quite mistaken, wasn't I? ;-)