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Kamen no Ninja Hanamaru, loosely translated to "Masked Ninja Hanamaru", is a side-scrolling platformer developed by Now Production and published by Capcom (Company) for the Family Computer in Japan on March 16, 1990. It later received a heavily-localized advergame release for the NIntendo Entertainment System in North America on November 1990 as Yo! Noid.
While nearly identical in terms of gameplay, both versions of the game have heavily altered story and graphics:
Along with the game's high difficulty, the game is known for its card-based boss battles, where both the player and their opponent are given a selection of numbered cards and must determine which ones to "attack" with (with the JP version having ninja combat and the NA version having a "pizza eating contest"). The main game's engine is a successor to the one used in the studio's earlier Wagyan Land (Game).
It is the second and final game that The Noid officially appears in, as he previously appeared in the computer game Avoid the Noid (Game) as an antagonist. The game later received an unofficial surreal 3D spiritual successor in 2017 with Yo! Noid 2: Enter the Void.
The majority of the game can be classified as standard 2D platforming, requiring the player to guide the character to the end of the level without being hit or falling off the bottom of the screen. A few levels have variations, such as one in which the Noid rides a skateboard, another auto-scroll level, and two levels where the player is required to control a gyrocopter. In all levels, being hit once will cause the player to lose a life. The difficulty is harsh, mainly due to the fact that losing a life means the player will have to restart the entire level again because there are no checkpoints.
Yo! Noid may be most memorable for its Pizza Eating Contests at the end of most levels, which seemed to function as a replacement for boss battles (even the final stage in the game does not have a traditional boss battle). These contests are essentially math-based puzzle mini-games. The players objective is to bet more pizzas than the 'boss.' (If the 'boss' bets 2 pizzas the player must bet 3 or more to win.) The 'boss' will normally be able to bet high pizza amounts than the player but the player has 4 power ups to use against the boss. (2 types of peppers that will cause the 'boss' to not eat his pizzas and two types of multipliers.)
There's also a whac-a-mole mini-game.