Shapeshifter (for those unaware) is an accolade you get when you score 100 points in any way with a picked up loadout. You can do this any number of times (in a row, in a life, in a match, whenever you want).
As a funny sidenote, some loadouts that I have picked up are so trash I wonder how people can ever play with those combinations of class+gadgets+weapons+attachments as their go to, god forbid their favourite.
I get that sometimes people are going for certain challenges and/or might be bad at the game, but damn, some (especially attachment) choices are so bad, that the default gun is usually 3x better than whatever combination of atrocities the person cooked up. It then usually ruins my streak when I pick said loadout up and try to use it to the best of my ability and inevitably fail. lol