Meh, I don't know. I mean, I know they are Assist Trophies, but there have to be some un-assisting ones as well, as that would be a bit of like "I got it and now I have a great advantage for the next 5-30 seconds. Plus, it does "assist" a bit though too, as it is not like it only does it to you but the others as well. It's basically an "Assistant or Neutral" Trophy.