What types scare Pokemon with the Rattled ability?

Question

Specifically Poochyena!

Answer 1

Dark, Bug and Ghost type moves will boost its speed.

Answer 2

It's not technically scaring, it just raises your Speed Stat if the move that hits you during battle are Dark, Ghost, or Bug types. All Pokemon that learn this are here:

http://www.google.com/m/url?ei=wCaoTfjRK5LWlQeojO27AQ&q=http://bulbapedia.bulbagarden.net/wiki/Rattled_(ability)&ved=0CBMQFjAA&usg=AFQjCNFYnRlpqsfndptNSmdvytXzJpzecw