We have items to say "thank you", "love you", "happy birthday", etc., but none to say "good luck". The only appropriate item I found was the [item2=Luck Charm], which is good but it's an old collection item and finite.

Perhaps a new set of plushies or stickers or something of the like to encourage our friends?

There are tons of items from the seventh anniversary with Luck in the name including the Luck Buckets.

I'd like to see a good luck sticker :)

Yeeeeeah, but they're not really...how should I put it? Not really as good at wishing someone luck in a personal endeavor the way a card or an item like a 'good luck' bear would be. The items you're talking about have more of a 'being lucky in games of chance' vibe rather than, say, giving a person encouragement who's taking an exam or going to a job interview. It's not really the same sentiment.

I love this suggestion, and would be happy to see something like inexpensive good luck greeting cards, or good luck bears. Can also draw on luck symbols from other cultures and have plushie/sticker/minion things like maneki nekos (I know there's already one, but more!), rabbits, lion dogs, so on.

Aww, I'd love a good luck bear. Maybe it's just the 80s kid in me thinking of the Care Bears, but it sounds so cute. Multiple colors!

Like said, none of those items are good for telling someone "good luck".