The challenge is that when Issei was a child he along with 4 others (Vali, Kiba, Xenovia, and Asia) were sent to the digital world. Issei's partner would be a Veemon or a Guilomon and Vali's partner was a Dorumon that Digivolved into Reptiledramon then Grademon then Alphamon. For Kiba a Hagurumon that would digivolve into Clockmon then Knightmon then Leopardmon. For Asia Salamon. And for Xenovia Zubamon. Also during the end of their journey only Issei and Vali were able to reach Mega and even then it was only one time. The rest only reached the Ultimate level. And even then after their journey together they started to forget each other including their own Digimon(with Asia being the only to remember and even then it's more of a dream) as such they have to start all over with their digivolutions. And if you can please don't make him a pervert. Also maybe I'll do my own chapter for this challenge.
The above are only suggestions but I ask of you that if you choose Veemon to be Issei's partner then he has to Digivolve to Veedramon, then Aeroveedramon, then UlforceVeedramon, and maybe Future Mode. Also please keep him human.
