Item description:

You will be in front of something, is for online battling press X

For the transformation trophy
select player setting and change the avatar in the avatar tab.

For the By Another Name trophy

Next to those Avatars tabs is the Tittle Tab, just select any of those

For the Friend with twenty faces and the ten titled one trophies

From the principal menu select NETWORK BATTLE, then COIN SHOP
then purchase 10 tittles ( the icon is like a gold medal ) and the purchase 20 avatars ( the little blue person icon )