Uh, a lot of characters, actually. It tends to work because pretty much every other aerial has the potential to outrange retaliation, so people often adjust to avoid those moves instead. Any tether character, Donkey Kong, Diddy Kong, Peach, Bowser, Wario, Yoshi, Captain Falcon, Ganondorf, Falco, Ice Climbers, Link, Samus, Sheik, Wolf...
Characters like Ike, Jigglypuff, Kirby, Lucas, Lucario, Ness, Pit, and R.O.B. can be chased after/followed up on to prevent a recovery afterward.
Spiked by Ivysaur N-Air? It's more likely than you think.