Pikachu and Peach are pretty good at approaching in my opinion. Can't underestimate the fact that their projectiles travel slow enough that they can chase right behind them. Opponent then has to think, if I dodge the turnip, what will Peach do? If I shield the Turnip, will I be grabbed? If I jump over that thunderjolt how many aerials will Pikachu smack me with?
Peach also has floating approaches, floating at the range of someones head and D-airing them almost always shield pokes and D-air combos into a ton of things easily at low percents.
Meta Knight may have decent approaches but he's not the only one that can do it. You just have to experiment and know how.
My Creations in Modnation Racers! Check zhem!
http://community.modnation.com/en-us/players/IvoYaridovich/creations
