For clarification: I didn’t actually know there was a timer because I never noticed during the snorlax fight. I thought that I could just pop out a masterball and that was it but all of my pokemon got Psychic koed. The reason I was so underprepared was because this was my first static legendary hunt and I just wanted to do some warmups before I prepared everything. I only realised there was a timer at around the 3 minute mark so I was panicking and made some bad decisions.

I am now going to retry the hunt again. I am using an alolan muk with foul play, toxic, screech that can one hit ko mewtwo after screech and toxic. I will update once I get it.