Click the flag to enter the number of mutations/powers(events) you want. Keep pressing space to generate more... Stuff. If you're result is too long and goes off the screen, you can go into the project with 'see inside' and check the 'data' part of the blocks. Click the bubble with the words 'Final Text' and you should get the whole thing. :3
I found this while surfing the internet. http://www.springhole.net/writing_roleplaying_randomators/laboratory.htm I was like "Hey! I wonder if this could be done on scratch?" I just said that. Out loud. In an empty room. lol. Anyway, this is the result. I took some things directly from that, but I tried to add more than I copied, like the fact that there are more than twelve animals in this. -_-