I wish Bakura had possessed Mokuba during Duelist Kingdom. It would have been so amusing to see him parade about as a 4′6″ kid instead of a 5′7″ teen.
It would have been even more amusing once Yugi and Yami won against Pegasus only for Mokuba to return to his body.

Imagine when Seto comes to and takes him home. ‘Mokuba’ acting more like his Season Zero self and trying to torture/murder Yugi at some point only for Seto to see the Ring and realize it has something to do with that stupid friendship cult and takes it from him. Naturally there is a bit of a fight over it but Seto is just stronger and more combat ready then his brother could ever be, possessed or not. He keeps the Ring in his office only to pick it up and glare at it.

Imagine the Ring fucking trying to murder Seto- because the items actually choose their hosts! The prongs embedded in the elder Kaiba brother’s wrist and draining him of life till Bakura realizes Seto would make a far superior host!

He manages to posses Kaiba and they immediately go off to challenge Yugi to another duel. Bakura is about to win and Seto just fucking takes over and denies him victory because HE is the only person allowed to beat Yugi! 

I just- yeah… It would have made a great AU of some kind.