There must be somebody on here who has.
It took me 9 years (2009) to find out that beating Chai in the arcade was even possible, since I didn't have access to the internet until then. A combination of spamming mud spider, crawl cyclone and resetting a thousand times and I finally managed to beat that little creep. Totally worth it just for the reactions you get from the Dobuita residents' to Chai when you talk to them.
But anyway, did anyone here manage to do it on their first try? Tell me, make me jealous.