There are different versions with different HP and rewards based on the stage level, so I doubt they'd also change the chance of spawning.

Originally Posted by Drip

It's been a while since someone posted about it, but the theory was, that they have a better chance to spawn on X-1 maps I believe. I doubt it's true, and they can definitely spawn from other maps as well, since I've had a couple on both 12-3 and 12-5, but then, I've been farming those two maps into oblivion

I see. I've summoned 3 or 4 SBs overall on my account so far, not from x-1 maps but rather 11-4, 12-3, and 12-5, although I haven't ran a lot of x-1 maps to either debunk or validate that.

Originally Posted by IvanLedah21

Even though it's likely to spawn more frequently from higher leveled maps, the fact remains since the base chance is so low, the gap (if it exists) is likely so small it's not really worth changing your regularly farmed map.

You're right. I'm not really keen on moving away from 12-5 as my farming stage regardless of SB summon %, probably not anytime soon.