So as the title says, i believe it's pointless to allow using of fishes in budokan.
First of all, if liquids are not allowed, why would fishes be ?
Secondly, chance to poison on items becomes pretty much useless. Same goes for poison skills and chance to fire from mages.
Finally, it is pointless to have stats like chance to poison / fire chance in items / skills since both players can spam perches.
So, in the end, it will be just about who has more perches and it is stupid to have this kind of "run", i.e. "run to find the most fishes", especially because budokan is every week. Also, using fishes doesn't bring any benefit to the staff aswell since it has nothing to do with tec points.
Furthermore, as everyone already noticed, duels become stupidly long ( like 3-5 minutes ) and just imagine duels like body vs mage. Senseless.
These are my arguments. Shoot me with feedback.