Frisk reveals items from the opponent's left to right (so it looks like right to left from your perspective). It's not Speed-based.This isn't a question specific to DOU, but I'm not sure where else to ask doubles-specific cartridge mechanics questions:
When Frisk activates and you get two messages telling you your opponents' items, what determines the order of the messages? Sometimes they go too fast for me to catch the whole message, especially with foreign mon names, and I'm often left guessing "ok I saw a sash, a life orb, and a bunch of chinese text, but I didn't catch who had what and it isn't obvious from context either", so any other clues would be helpful. The ingame help button doesn't keep track of your opponents' items either.