I've found a chart showing the chances, and this is what I've found: Floor 5-9 = 3.6% | 10-14 = 6.9% | 15-19 = 10% | 20-24 = 12.9% | 25-29 = 16.1%. [I Hope This helped!]
yo, yesterday i got pebble on floor 5 lol, and i managed to do everything without losing a heart. (I was with people, but we were stealthy and only a few died)
Here’s a little lore on this: the dude that said “Hey Apple!” Is named Patrick. He worked in the lab from Piggy book 2. He talks to his colleague Rick the Rabbit. The reason his eye is white and leaking this black substance is because he drank a potion containing the insolence. And after a few minutes, he was fully reformed into the character..”The Oumbra.”