Decade's and Diend's henshin questions...

[Sentaifan'07 Xman]

I have my own thoughts on the matter as well. What if Decade were to use DiEnd's henshin and summon cards, would he then become DiEnd and/or his summons?
e.g. Decade slots in DiEnd's Ohja card, and becomes Ohja.

Since Daiki "borrowed" Decade's cards on a number of occasions, I figure Tsukasa should return the favour.

Then it would get really confusing unless if they were leaving a final warning to each other to not get in their ways.

 

[Kenori]

The only card he borrowed were Tsukasa's Final Form Ride and Final Attack Ride, which are versatile. I don't think anything would happen if Tsukasa tried using Daiki's cards. He'd probably just get an error at best, or have the belt violently eject like the Faiz belts do at worst.