Poy Poy - Wikipedia
Poy Poy is a multiplayer action game in which four players battle each other using various props, such as rocks, logs and blocks of ice in one of six environments. Combat consists of picking up the various props, and throwing them at opponents. One can also pick up and throw the opponent's character directly. 
Poy Poy (USA) : Konami of America - Internet Archive
Poy Poy is a multiplayer party/action-game in which four players battle it out by throwing rocks, bombs, logs, wooden boxes, etc. at each other on varying battle arenas for a set amount of time. At the end players are awarded points based on their remaining health, how many times they were able to hit others with objects and how many white hearts they were able to collect from the arena.