Standouts:
Captain Falcon can d-air for a meteor / spike depending on where you hit with it it, and his side-B in the air is a spike.
Ganondorf's d-air is brutal, but I believe it's a meteor. His side-B is a guaranteed kill, but he also dies
Falco obviously has his d-air
Fox has that shine "spike" if that counts
Ike has a ton of meteor/spikes. His d-dair, d-tilt, n-B, and the downward strike from his up-B all meteor or spike
Marth's d-air spikes and you can sorta easily Ken Combo into it
Roy's d-air is a strong meteor, but can be hard to hit with the right hitbox
Diddy Kong can meteor with d-air and certain up-B hitboxes
Charizard's d-air and down throw are meteors and his d-smash is a spike
Donkey Kong's d-air and f-air (certain hitbox) and his side-B
The rest of the spikes / meteors:
Ivysaur's d-air and up-air kinda
Luigi's d-air, certain hitbox
Mario's f-air, certain hitbox
Kirby's d-air
Lucario's aerial side-B
Ice Climber's f-air
Olimar's d-air
Pit's d-tilt and d-air (certain hitbox)
Samus' d-air
ROB's d-air
Snake's d-air and f-air
Sonic's f-air (certain hitbox) and d-air (certain hitbox)
Toon Link's d-air (certain hitbox) and d-tilt (certain hitbox)
Link's d-tilt I think?
Wario's d-air
Yoshi's f-air and d-air (sorta)
Zelda's d-air
Mewtwo's d-air