1) A type of duel between 2 individuals on d-wheels (a type of motorcycle) involving the use of yugioh cards and speed counters. A special rule involves banning the use of spell cards, which in turn are replaced with speed spell cards, which use speed counters to activate their effects.
2) A special type of yugioh duel used in Japan which involves special rules:
5 card extra deck
20-30 card main deck
4000 life points
3 monster zones

3 spell/trap zones
(This is similar to the duel links playing style)

the thing that you don’t have when you’re phones percentage is over 20