More info on IGDB

Motto Trump Shiyouyo! - I-Mode no Grand Prix is a collection of card games that includes Poker, 21, Blackjack, etc. The gameplay is in first person perspective and the game features up to 4 human players to play at the same time using the multitap function. Trump or trumps or trump suit are terms used in trick-taking games, traditionally called whist-style games although the best-known example may now be bridge, where cards of one suit rank above all non-trump cards, and automatically prevail over them, losing only to a higher trump if one is played to the same trick. In most games, trump cards cannot be played if the player has any cards of the suit led to the trick; in a few, trumps can be played at any time. Playing the first trump to an already-started trick is known as ruffing; if another player were to play a higher trump, that would be an overruff or more commonly an overtrump.