Magicarp

Ok, so Open Pkhex, view any pokemon and change its nature to Bold (just on the view panel, don't set the pokemon, you don't need that at all). Ctrl + N, type Suicune in species, select any, right click, view. TADAAAAA! You got a valid Bold Suicune. Hope this helps

Just tried it on an emerald savefile and you are right. I don't know why it isn't considered legal on gen3 but it is on gen6. If I had to guess, maybe this is related to this: "24/03/10 - New Update: - Legality: Added Encounter Slot RNG correlation checks for Gen4 (and Gen3). Because Encounter Type PID mismatch wasn't enough!" I lack the knowledge to narrow down the issue you are experiencing. I hope someone is able to help you with this topic. Cheers

Just tried your Swellow on an XY save and looks completely fine to me. No errors found. What did you experience with this pokemon?

To generate a Pokemon Ctrl + N will take you to the database, then search for whatever you want, right click + view, and it will make it pop on the edit sidetab. There you can fine tune that pokemon you just generated. In this fine tuning you can fix OT Name and ID, meeting date, etc. Will save you A LOT of time, since it will already fill a lot of information which makes it pass all meeting conditions. To bring back your SM pokemon to ruby I'm not sure, but have you tried dumping your pokemon boxes, opening your ruby save, and loading those pokemon there? I don't recall if it is possible to turn a ,pk7 to .pk3, but it is worth giving it a shot. Cheers

Using former PKHeX version, is there a way to edit my save so I can make it like if I had done a Surprise Trade? I play on emulator and can't connect to online servers.