I always loved this game and yet wanted it to be more difficult. But the main idea of this hack was not only to raise difficulty level - but to make player use many things that were previously “unnecessary”. Now you have to use different NINPO-attacks and even tactics on bosses. Also the idea of *fatigue* was added to gameplay - inspired by that anime episodes, where Yattarou had to change battery).

• BGM-test and three difficulty levels are available from the main menu (built-in “hard-mode” is always ON by default);
• being underwater (without proper equipment), running, jumping and using of turbo-attacks are slowly draining HP (accumulated points of “fatigue” are reset upon taking “heart” item or taking damage);
• running is now working only if you hold down directional button after double-tap;
• there are 9 lives, but no continues at all (but there is a “secret combination”, written somewhere in the game, that will allow you to get and use passwords);
• added ability to gain 1UP for score points;
• the cost of NINPO-attacks was mostly increased (but there are some, that became cheaper);
• the HELP bar is empty at the start of every level, HELP usage is also more expensive now, but HELP-gauge is slowly restored regardless of the cat chosen;
• Pururun’s head tiles were edited a little.

• Database match: Cat Ninden Teyandee (Japan)
• Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
• File SHA-1: 4366AA9D91ADC80EC063667C59421B6245B0B786
• File CRC32: 6F1485ED
• ROM SHA-1: 7D47CD172B886ECE5B98CCB8FEACBACEFA465C3A
• ROM CRC32: 45878D7F