You may be taking a break but that doesn't mean one can't make predictions (again) time for a fat comment. (note: I assumed some pairing of Pokémon was going to occur so those assumptions were used otherwise there may have been a need for some more barrel scraping)
The Lake Guardians and Dawn: kind of process of elimination, Dawn was going to be a character 100% so link that to the empty slot
Dialga and Mars: Galactic Commander could be switched with Jupiter
Palkia and Jupiter: Galactic Commander could be switched with Mars
Giratinia and Fantina: Ghost trainer with the ghost legendary makes sense also an elite four member so seems necessary
Cresselia and Cheryl: In my mind, I imagine Cresselia to have big gentle mom energy like tucking you into bed and kissing you goodnight, especially as the counter to Darkrai and Cheryls design speaks to that greatly, also works for an upcoming prediction
Heatran and Bertha: Bertha is ground type and Heatran according to bulbapedia "represents the earths core" so matches energy
Regigigas and Bebe: Kinda out there however due to you making the regis a bunch of robots, you made Bebe, a computer technician, really fitting. Also wouldn't be too bad to see honestly because Bebe looks kinda hot in the TCG art example bulbapedia provides.
Manaphy/Phione and Candice: Ice type trainer and the sea guardians (oh god its a 4 way battle now lol) seems fitting, I imagine the reasoning being wanting to see if she could freeze the sea.
Darkrai and Marley: The goth looking character with the nightmare pokemon who is characterized as an edgy loner who is good deep down (sometimes) is very fitting to me. Also Marley and Cheryl are in the same group of specialized trainers so them sharing the Darkrai/Cresselia pair makes sense
Shaymin and Gardenia: Grass and grass simple as
Arceus and Cynthia: Originally this was Cynthia Giratinia but for the character that is possibly the most thirsted after and also a confirmed legendary nerd, she should get to meet god because to many people meeting her is also like meeting god fr fr.
Hopefully I got most of these right lmao don't wanna make a mega thread again. Or who knows I may have written the chapter inadvertently lmao.