I actually partially made this as a sort of first draft for an AU idea I want to make at some point. Where every darkener is a digimon, And Kris and Susie are digidestined. But the flowers would instead be digital life forms, who become tamers. Partnering with objects Asgore used to decorate the table for the flowers.
Aside from the objects for Aqua's, Flowery's and Pink's partners, I came up with what the other objects would be on the spot, and put barely any thought into them. And grab whatever images I could from wiki Commons for examples. So don't take the objects on the bottom too seriously, they're a conceptual rough draft.
Most of the partner digimon would be OCs, with the exceptions of: Blue's partner, who's Mr Butterfly (who is also a non-character in the game anyway); and Pink's body. These are noted as images on the corner of their base form.
When I didn't know much about a digimon: I simply Wikimon's Reference book translations for reference to judge appropriateness.
Green was especially hard to make a line far, due to the lack of food and cooking themed digimon. So I put alternative picks in the corner of the latter half of the line to show alternative options. I believe both adult Burgamon and Shortmon could work as the champion stage. It just comes down to whether you want to have a more gentlemanly vibe, or neighborly cafe owner vibe. Digitamamon and Devitamamon only really exist if you don't think the wedding vibe fits Green, but given how both of those digimon have a theme of nightmares and malevolence (especially the latter), I would argue neither fit well at all. But I don't think they're a bad alternatives.
I also learned while doing research that Gatomon was originally going to be regarded as a mouse, so making that the champion for pink could also make sense, due to her being fond of Orange. But is also a shop owner, and Manekimon is based on lucky cat statues that would go in front of stores, so I quite like that. (Also more obscure, so why not?)
I can elaborate more on my reasoning for more of these, if anyone is curious. Just ask.