INDI BELRA is fool.

The Belra Bug

The Belra bug is rather infamous on GC yet is generally not well understood. This video demonstrates exactly what the problem is. Indi Belra's arms are supposed to launch from its sides, which means that if you stand exactly in front of the Belra, its arms will pass by you without making contact, since your body is roughly the same width as the Belra's. On discs that have the bug, however (JP 1.02, US 1.00, US 1.01), you can easily see that the Belra's arm is in the correct position until it's about to fire, at which point it warps from the Belra's side to its chest. Since the Belra is launching arms out of its chest, standing still doesn't work anymore, as you're directly in the line of fire when you're standing in front of the Belra.

It's likely that the arm projectile needs a skew of +/- 30 units or so from the Belra's position in order to launch from its sides, but Sega forgot this offset and instead launches the arms from position 0, i.e. the center of the Belra, thus creating the bug. The fact that the arms shoot out of the Belra's chest alone confirms that this is a bug, but this conclusion is also supported by the fact that the majority of PSO releases don't have this problem, i.e. JPv2, USv2, EUv2 on Dreamcast, EU 1.00, US 1.02, JP 1.03, JP 1.05 on GameCube, and US/JP Blue Burst. Editions released both before and after the affected GC discs lack this behaviour, thus demonstrating that it's a bug Sega introduced when coding GC and then later rectified. It is therefore definitely not an intentional mechanic that Sega decided to make "easier" on PSO Plus, as has been suggested in the past.