Did you ever find this? I'm looking as well.
Either that or a modified Japanese Bonus Disk that will read a US save, or tutorial of how to hex Value edit the J Bonus Disk rom to read a US save
My little sister was on school vacation this week and got quite far into the PAL version of Colosseum this week. I might have a completed save of that soon. I have a completed US save I did as a kid durring the summer holidays between year 4 and 5 
I think once my sister is done with the PAL version she might attempt the Japanese Version. If she does I'll dump/back up the save and upload it. The only reason to really play the japanese version is because the girl in your party wears a belly shirt, smiles and you get all the pokemon with japanese names, but you can just nick name that. So everything is pretty pointless. The only real benefit is the Ageto Celebi.
Im trying to figure out of to hex edit the japanese colosseum bonus disk's rom/iso to read a US save. That way you can play it in english, beat it in english, purify all 48 shadow pokemon in english and then just use the japanese colosseum bonus disk to unlock the Ageto Celebi on your US save. It might be a lot easier.
Ill let you know how it goes. The edited Japenese Bonus dink to read a US save is more likely. No guarentees on the japanese save, buh it might happen. If I can edit the bonus disk Ill make an easy tutorial, either with screenShots/pictures or a video
I think once my sister is done with the PAL version she might attempt the Japanese Version. If she does I'll dump/back up the save and upload it. The only reason to really play the japanese version is because the girl in your party wears a belly shirt, smiles and you get all the pokemon with japanese names, but you can just nick name that. So everything is pretty pointless. The only real benefit is the Ageto Celebi.
Im trying to figure out of to hex edit the japanese colosseum bonus disk's rom/iso to read a US save. That way you can play it in english, beat it in english, purify all 48 shadow pokemon in english and then just use the japanese colosseum bonus disk to unlock the Ageto Celebi on your US save. It might be a lot easier.
Ill let you know how it goes. The edited Japenese Bonus dink to read a US save is more likely. No guarentees on the japanese save, buh it might happen. If I can edit the bonus disk Ill make an easy tutorial, either with screenShots/pictures or a video
That's a great idea, I would go that route but it does not satisfy my OCD >_< I feel that while it would be much easier to just pokesav those into a HG/SS save they would not be unique pokemon that I cought with uniquely generated EV and IV values, and natures ~_~
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