So, for online battles, I always used a shiny rhyperior (that
always took too long to hunt for and train). I was lucky enough to get a less than 2 iv one last time I tried (I've given up). But most people quit when they saw it, thinking that I would have level 100 shinies and such. I didn't.
So, I wanted to start a thread here on intimidating pokemon.
Here are some examples:

Your attack has now been lowered
Here is a search that might help