A non intrusive addon for current DB 2 which maybe would make happy metabolism people.
This would use the organism's hash -that riddled string stored at the end of saved bots-. You know, digesting something more often than less is about finding the right wrench to disassemble their stuff, which actually reflects the DNA structure in an (un)hashed fashion.
So, we could assign a few of the first hash characters to some traits. Like, the first letter to energy, the second to body, the third to shell, and so on.
Then, we'd have the hash hacking shot or... well, the enzymatic shot. This one uses .shootval as the byte code that must match the hash letter. If it's succesfull, eureka! you get something like a 50 .shootval powered shot with the cost of 1. If not, you get nothing. Of course it's gonna be cool for the bot if the rival species never change, once it figured the right enzyme to digest them. But, it isn't going to be so cool if they have lots of mutants, which will live happily and turn back to dominate. Or if actually it's living among many species.