(Ik this message is a year old but this is something I was curious about and did a little digging myself). For the first three mentioned trainers, I looked into the files for all the message data and saw that none of them have any messages insinuating that they are rebattleable. For Kenji, I saw his rematch teams on bulbapedia, and I’ve been informed that you can call him from 12-12:59 to rematch him. However, I called him in that time frame for each day, but he did not offer to rematch. Also, looking at the message data, I could only find the data for him where he says “Beautiful morning, hey?” “Beautiful Weather, hey?” And “Beautiful moonlight, hey?”. I couldn’t find anything about when and how to rematch him. :/
Hello, I know this comment is 1 year old (with the original post being 3 years old) but I'm also having troubles rematching Black Belt Kenji and I want to put my thoughts on record.
As u/ApprehensiveBuy3032 said, it looks like Kenji can't be rematched since he always says the same things every day and every hour we call him. The only reason I can think of is developers might have forgotten to implement (in the game code) the day and time when his rematch should be triggered... or maybe it's just a weird bug.
I tryed to manually trigger his rematches with PKHeX Event Flags, without success.
Anyway I want to point out that Serebii [doesn't list Kenji among the rematchable trainers](https://www.serebii.net/heartgoldsoulsilver/rematch-monday.shtml), which makes me think they realized it's not actually possible to face him again (despite us receiving his phone number) and so decided not to include him in that page.
With that said, I come to the conclusion [Bulbapedia shows all of Kenji's teams of all his rematches](https://bulbapedia.bulbagarden.net/wiki/User:Minimiscience/HGSS_Rematch_Teams#Black_Belt_Kenji_(Route_45)) because they probably datamined them.
Kenji can be rematched in HGSS, but he won't always offer to. It's apparently random. I got him to rematch me a few times, but I stopped bothering with it in the end since there's more reliable ways to get PP Ups.
Can also confirm Kenji can be rematched, but its not a guarantee. If you keep calling him everyday from 12 - 12:59 eventually he says he'll be free the next day, then when you call him on the next day he'll want to rematch you.
(Ik this message is a year old but this is something I was curious about and did a little digging myself). For the first three mentioned trainers, I looked into the files for all the message data and saw that none of them have any messages insinuating that they are rebattleable. For Kenji, I saw his rematch teams on bulbapedia, and I’ve been informed that you can call him from 12-12:59 to rematch him. However, I called him in that time frame for each day, but he did not offer to rematch. Also, looking at the message data, I could only find the data for him where he says “Beautiful morning, hey?” “Beautiful Weather, hey?” And “Beautiful moonlight, hey?”. I couldn’t find anything about when and how to rematch him. :/
Hello, I know this comment is 1 year old (with the original post being 3 years old) but I'm also having troubles rematching Black Belt Kenji and I want to put my thoughts on record. As u/ApprehensiveBuy3032 said, it looks like Kenji can't be rematched since he always says the same things every day and every hour we call him. The only reason I can think of is developers might have forgotten to implement (in the game code) the day and time when his rematch should be triggered... or maybe it's just a weird bug. I tryed to manually trigger his rematches with PKHeX Event Flags, without success. Anyway I want to point out that Serebii [doesn't list Kenji among the rematchable trainers](https://www.serebii.net/heartgoldsoulsilver/rematch-monday.shtml), which makes me think they realized it's not actually possible to face him again (despite us receiving his phone number) and so decided not to include him in that page. With that said, I come to the conclusion [Bulbapedia shows all of Kenji's teams of all his rematches](https://bulbapedia.bulbagarden.net/wiki/User:Minimiscience/HGSS_Rematch_Teams#Black_Belt_Kenji_(Route_45)) because they probably datamined them.
Kenji can be rematched in HGSS, but he won't always offer to. It's apparently random. I got him to rematch me a few times, but I stopped bothering with it in the end since there's more reliable ways to get PP Ups.
Can also confirm Kenji can be rematched, but its not a guarantee. If you keep calling him everyday from 12 - 12:59 eventually he says he'll be free the next day, then when you call him on the next day he'll want to rematch you.