mmm i have lots
Kiran's Spirit Board would probably include bonus fights of Caeda, Tiki, Pegasus Sisters, Alm & Celica, Seliph, Lyn, Micaiah, and Xander, as well as new spirits 3* Alfonse & Sharena, 4* Fjorm, 4* Eir, and 4* Surtr
Madeline's Spirit Board would have 3* Theo, 2* Mr. Oshiro, 1* Old Woman, 4* Badeline, 3* Archer Madeline, 2* Archer Badeline, 3* Golden Strawberry, and 4* Crystal Heart. The Archers would be the characters from Towerfall and would refer to Towerfall rather than Celeste.
If Monokuma does make it in, Monokuma's Spirit Board would be 4* Junko Enoshima, 4* Makoto Naegi, 3* Hajime Hinata, 3* Shuichi Saihara, 2* Monaca Towa 2* Kaede Akamatsu, 1* Nagito Komaeda, 1* Kokichi Oma, and 4* Remnants of Despair
Frisk's Spirit Board would have: 4* Chara, 3* Sans, 3* Papyrus, 3* Toriel, 3* Flowey (which is enhanceable to 4* Photoshop Flowey), 3* Kris, 2* Alphys, 2* Human Souls, 2* Mettaton, 2* Undyne, 2* Asgore, 1* Susie, and 1* Ralsei
Peashooter's Spirit Board would have 4* Dr. Zomboss, 3* Crazy Dave, 3* Sunflower, 3* Shadow Plants, 3* Wall Nut, 2* Potato Mine, 2* Buckethead Zombie, and 2* Penny.
And finally, Bandana Dee's Spirit Board would have new Kirby characters, including 4* President Haltmann, 4* Void Termina, 3* Hyness, 3* Adeline, 2* Lor Starcutter, 2* Drawcia & Paintra, 2* Friend Heart, and 1* Vividria