Yume Penguin Monogatari (Japan)

In Yume Penguin Monogatari, players control Penta, a penguin striving to lose weight and win back the affection of his girlfriend Penko, who has fallen for a more svelte seal.

The game's unique mechanic revolves around Penta's weight. When Penta consumes junk food like cakes or hamburgers, he gains weight and becomes obese. This heavier state makes Penta move slower but allows him to jump higher. Conversely, when Penta eats vegetables or diet pills, he becomes thin, enabling faster movement but with lower jumps.

Each stage is a side-scrolling platforming adventure filled with various obstacles and enemies. The primary goal is to survive the level and defeat the boss at the end. Players must skillfully manage Penta's weight to overcome different challenges. For instance, some areas might require Penta to be thin to squeeze through narrow gaps, while others demand a heavier Penta to clear large chasms.

Throughout the stages, Penta will encounter various enemies and items. Items can either help Penta lose or gain weight, depending on the player's strategy. The game features a 'love' or 'time' meter that depletes; if Penta becomes too fat or runs out of time, the game ends. This adds pressure and a strategic element for the player.

With its charming graphics, catchy music, and distinctive gameplay, Yume Penguin Monogatari offers a unique and entertaining experience on the NES.