Relevant rules (that were quoted above):
A. " If a card effect causes a creature to be used while it is stunned, the creature is exhausted and the stun status card is removed, just as if the creature had been used normally."
B. "The next time that creature is used , the only effect of it being used is the creature exhausts and the stun status card is removed instead of anything else happening. The creature does not reap or fight "
C. "While resolving a card ability, resolve as much of the ability as can be resolved, and ignore any parts of the ability that cannot be resolved."
D. "When a creature is used to fight, the creature exhausts and its controller chooses one eligible creature controlled by the opponent as the target of the attack"
1. Card effect causes a creature to be used to fight, through the text "Ready and fight with a neigboring creature."
2. That creature is stunned, the opponents board is empty.
3. According to rule A - The creature is exhausted and the stun status card is removed, just as if the creature had been used normally.
4. According to rule B - The next time the creature is used, it does not actually fight
5. According to rule C - Resolve as much of the ability as we can. It cannot fight for many reasons - namely it was stunned, secondarily the opposing board has no targets, thirdly, it is already exhasted due to rule B.
6. Rule D doesn't come into play because the creature did not fight.
7. Other cards that may trigger based on things fighting don't trigger because of 6.
There are different ways to interpret the rules as written. Various rulings guide you how it is meant to be interpreted. Hopefully future rule updates spell this out more clearly, especially with regards to the priority between different sometimes interacting processes.
Edited by saluk64007