This is a thread to answer everyones questions about what happens with stop opp ability and stop opp bonus in the same round. Mods if you find that this guild is clear and helpful, please sticky. I was once a new player who asked this very question and i think having a stickied guide will be helpful.
For the following examples, assume that:
1. the room you are playing in is non-random
2. that neither person has played any pills
3. that all bonuses apply and are active
Take a look at the following round.
Otakool VS Flo
(ability) stop opp ability
(bonus) +8 to attack power
(ability) stop opp bonus
(bonus) -2 opp power
Who stops what? Does Otakools bonus get stopped?
The best way (and easiest i've been told, i forget from who) is this! Put all the abilities in a chain of what affects what. Use paper and a pen if you have to. The beginning of the chain is always the stop opp ability or stop opp bonus that has nothing affecting it. This is what the following round looks like in a chain.
(Otakools ability) Stop opp ability ----- (Flos ability) Stop opp bonus ----- (Otakools bonus) +8 attack power
Since nothing has stopped Otakools ability or affected it at all, Otakools ability follows thru and stops Flos ability. Otakool keeps the +8 attack power and wins the round.
Mods i would like to post 2 more slightly different examples but i have reached my character limit. I will wait till this thread gets approved
No, it would not. Leaders are a special rule as even twice the same Leader activates their "bonus" (which is actually more a malus).
Two (three) rules for this:
1) Leader ability can never be cancelled
2a) Leader bonus, if activated, can never be cancelled
2b) Leader bonus is activated as soon as there are any two - different or identical - leaders in one hand, therefore 2 leaders = no Leader effect.
This is mainly due to Leaders working "behind the scenes". Their bonus/ability is always affecting all cards, not only when played. You may look at it like this: a Stop Bonus against aleader stops his bonus... but not the inactive leader's bonus which then still stops the ability of the Leader just played. [This is, admitted, complex around-3-corners thinking. It arrives at the correct conclusions though: There is still at least one Leader whose bonus cancels all other leaders' abilities]