Marvel Disk Wars: The Avengers

Both are shows targeting mainly on kids. The main hero is a young boy who obtains some creature/hero contained in some device (pokeball/disk) and battles with said creature/hero against other device owners. 

Both are shows targeting mainly on kids. The main hero is a young boy who obtains some creature/hero contained in some device (pokeball/disk) and battles with said creature/hero against other device owners.  

Both are focused around a group of kids that collect certain objects that contain special creatures in them and are used to fight against the badguys and save the day.  

Shaman King focuses on Shamans who can call back spirits and use their powers for good or evil. They use their own body as a medium. Spirits can be past heroes/humans or nature spirits. Marvel Disk Wars has heroes/villains turned into chips, which allows you to channel their power. 

Kids use digital based hero's to fight bad guy's and their digital villains. Hero's and navies are stored in devices. PET/DISK. Both anime's use classic characters from other works. Battling evil organization that has the same power as kids. 

Both animes fouces around super hero. Like Tiger and Bunny, the heroes also have a time limit for their powers.  

Both show's have kids as the main characters. Both have a digital based theme (monster?hero's). They also fight other monsters or hero's and after they win they capture them. (Digivice/DISK)