The PAL version contains a glitch not present in the Japanese and American versions. Zero's main weapon is written as "Z-SABRE" in the Japanese version, and "Z-SABER" in the English version. This background was replaced in Mega Man X5. Rockman X5's title screen background features artwork of X and Zero. The screen was removed from the international releases.
This is displayed between the Capcom logo and the intro video. The Japanese release contains a warning screen reminding the player to keep the room bright, sit a sufficient distance from the TV, and take a break after one hour. This does not happen when X finds the Capsule. Light mistakenly calls the Body part the "Head" part once. To trigger enough Sigma Viruses to appear is difficult, and very precise.
The trick is for Zero to become infected by the Sigma Virus until he becomes invincible. However, it requires a great deal of work more so than with any other Light Capsule, which is why most assume that it can't be done. The Light Capsule in Skiver's Stage is not impossible for Zero to reach. Nevertheless, the script does account for the possibility of Zero finding them. There are two Light Capsules that are impossible for Zero to reach without cheats. Unused/Hidden Script Hidden Dialogue between Zero & Dr. These two graphics weren't used since X4's demo, yet are still present within X5.