If you don't have access to a good auto-adopter, try lurking boards on the Pound Chat, I've gotten a WN Werelupe with an aged avi petpet from there before. xD
I didnt know you could use google lol I have good luck with a fast comp pound surfing.. its almost like RSing but with pets. Over the last month ive obtained: Sketch skeith, jelly kougra, desert grundo, halloween lupe so far its been a good month. Just have to be quick! And of course your account is 4+ months old
Just surf the pound, refresh and refresh. Yeah, it takes time and can be annoying but it pays when you get a good pet ^^
Rider made a guide about it: general-chit-chat-f6/finding-pets-stuck-in-the-pound-t27879.html I wouldn't say it's one of the best ways though, as a lot of people is using this.. It's better for wned pets imo ^^;
Legitly, keep refreshing and you're bound to come across something. Also keep a look out on the Pound Board and maybe the AC Board too. If you're lazy just use an Auto Adopter. 8D
yeh, auto-adopter is easiest, but watch the boards 'cos some people chuck rare pets in, like i managed to snag a Slime Koi which I was pleased about lol