Hey there! I actually have a Terrakion now. I haven't had a big update in awhile, so I haven't taken it down. I'd be interested in the Serperior for sure!
Thanks for pointing these out to me! There's been a big discussion about hack checking 3rd gen events going on in the hack-checking thread right now, so I'm definitely interested in getting rid of all of these events that can't be verified. We would love if you could weigh in.
What are the reasons for Pikachu and Kangaskhan? For shiny Lickitung, my friend that I got this from had it hack checked and decided it was partially suspicious but not necessarily a hack. Is it a known hack?
I can't check Jirachi's moveset now since I'm at work, but I'll remove it just to be safe.
That's good to know about the others! I will remove them immediately and wait for your response to my questions. Thank you so much!
I'll offer something else for the Thundurus then, lol. I usually like to do equal trades, like shiny legend for shiny legend, but you already have all the shiny legends XD. How about the 06193 PCO Emboar? I just need an UT Shiny Thundurus because mine is touched lol.
I don't personally have the 00317 PCNYa Pikachu myself, but it's listed on Pokemon Secure's hack list:
PCNYa 00317 Pikachu - Mild - 5/13/07 - Wrong Info
For Lickitung: In gen 3, the PID determines what nature a Pokemon has, not the other way around. This 45147 Lorren PCNY Wish Shiny Lickitung is Impish nature, but the PID tells me the nature should've been Serious. It means the PID was rolled first, then the hacker probably slapped some random nature onto it. I noticed a lot of your information in your OPs have information coming from PKHeX, so you can try this yourself.
For Kangaskhan: I actually mentioned this one in the hack checking thread last night. PCNY Wish are all supposed to have fateful encounter flags turned on, yet this Kangaskhan is a very popular hack floating around, and its fateful encounter flag is off.
I don't have a legit 60830 Pokepark Jirachi myself, nor have I seen one, but I was told there were two out there, and one of them is owned by only 2-3 people.