Jump rope gives your tamagotchi 6 skill points in a random category after doing 30 jumps. Mimic gives your tamagotchi 6 skill points in a random category after completing 6 rounds. Shape gives your tamagotchi 8 skill points in intelligence when you reach 30 shapes. Dance gives your tamagotchi 8 skill points in arts/fashion after completing 6 rounds. And Flag gives your tamagotchi 8 skill points in social/kindness after completing 8 rounds.
And if you complete a whole game, your tamagotchi loses 3 lbs. Otherwise your tamagotchi will lose 0-2 lbs. depending on how far you got in the game.