This is a Digimon Frontier powered mc. I saw a story similar to this a while ago set in DxD, I think it was anyway. So here it is the mc has the D-Tector the digi-vice used by the characters in Digimon Frontier as, for starters, out of the 20 spirits, he has Agunimon and Lobomon at the start later on he can unlock and use the other spirits slowly working his way to unlocking MagnaGarurumon and EmperorGreymon and any other forms that are available when it concerns the spirits and then finally the Digimon Susanoomon after unlocking all spirits and I think it would be cool if the mc had Digimon partners as well such as Agumon and Gabumon from the first series that lead to them being able to fuse into Omnimon or Gaomon and Agumon from the Data squad series with their MirageGaogamon Burst Mode and ShineGreymon Burst Mode forms or if the authors want they could just have the mc with one Digimon partner but either having the 2 from the from the first series or Data squad I think would be very cool. And what I mean by multiple worlds, I hope to see this character either in multivrrsr travel fanfics or multiple fanfics from where the mc is in DxD, One Piece, Marvel, DC, Danmachi, MHA, and anything else people choose to place the mc in hell even Attack on Titan I think might be neat I just want see other Digimon fanfics set in a lot of different worlds maybe with my idea maybe with something different like Ben 10 but Digimon instead of aliens, a Digimon Cyber Sleuth inspired story or a Digimon tamer with a system similar to the Digimon Data Squad Playstation 2 game when it comes to digivolution of the Digimon so yeah I hope someone writes my idea.