Should there be a Trick Room ability?

No, but there should be more Rooms and an item that extends Room time (maybe the Dubious Disc). Inverse Room should totally be a thing so that Pokemon with shit typings are suddenly good and Pokemon with good typings are suddenly shit.

>>29517216
y e s
i would fucking love it
give it to cofagrigus or something

>>29517216
Dialga should desu
Palkia should get Wonder/Magic Room and Giratina should get Desolate Land/Primordial Sea but it turns the game into an Inverse Battle

>>29517258
Inverse oom would be so good

>>29517258
>Inverse Room should totally be a thing so that Pokemon with shit typings are suddenly good and Pokemon with good typings are suddenly shit.
I'd love that. Imagine how much chaos that'd cause on the competitive scene though.

>>29517258
Inverse Room would be interesting. And kinda funny for mons that have terrible typings in both normal battles and inverse.

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>>29517258
>bug is now the best offensive type
>steel is now the worst defensive type
Get to work, gamefreak.

Definitely not on anything that's not a box legend. Trick Room is already a very strong option in Doubles format, an autosetter would make TR teams absurdly overpowered.