Suggestions on how a greninja battle bond could work with my MC
So in this next chapter Rex Fang in a middle of a battle will unlock the full battle bond with his greninja, its form looking slightly different from Ash Greninja. However once the battle is done Rex collapses, pale, coughing blood, and breathing erratically. And in the hospital he flatlines for 15 seconds. Rex is already pretty close to a lucario but I want to have the battle bond be a different skill set for Rex to overcome.
And probably for a while the lucario will probably not let greninja get close to Rex.