Apparently, they're all used for all speed, fly, and power type characters, but sadly, they cause me to get most cheap deaths and lose rings quickly and don't seem to work well for me to beat high scores in order to get my rank up to 25 or less since I'm at the two star S rank, and I want to increase it to three stars and keep it that way. Does anyone have any tips on any useful buddies, characters, and stuff like that for me to use to beat high scores in the special timed mode stages?