Game Boy Mega Man IV. First original Game Boy Robot Masters (not from NES), new item system via Eddie's shop. Polished presentation, smooth scrolling, fair balancing. An excellent portable Mega Man, almost on par with Mega Man V. A real gem for franchise fans to discover.
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Category
Action1 player7+
Description
Japanese version of the fourth Game Boy Mega Man with original Robot Masters and the P-Chip item shop. Published by Capcom, released in Japan in 1993. Six new Dr. Wily Robot Masters, P-Chip item shop, new weapons, and original levels.
Japanese edition of the portable Mega Man IV, released in November 1994 under the Rockman World 4 label specific to the Japanese market. Distinct Capcom rigid case and obi, with a more dynamic cover than the Western release. Japan run was shorter than the US version, which leaves it the less visible piece of the Rockman World sub series, although Japanese completists clearly separate the World branch from the home console branch.
Memorable bosses
More ambitious, the fourth portable installment offers Robot Masters mixed across two generations and a memorable duel against Ballade, whose shots burst in a cross. Item shopping and varied weapons enrich the run-up to each fight. Polished staging and better-judged difficulty make it one of the series' peaks on the console.
Is Rockman World 4 still worth playing in 2026?
The first Game Boy Mega Man to feature original Robot Masters rather than recycle NES ones, this fourth portable entry finds its own identity. Eddie's item shop adds a welcome strategic layer, the presentation outshines earlier outings and the scrolling stays smooth. The difficulty is better calibrated, which makes the experience friendlier for anyone trying the portable line for the first time. Without quite matching V, it remains an excellent Mega Man and still a fine pick today for fans of precise 2D action platforming.
