Suggested by Destroyer The BioLizard is one of the strongest Sonic monsters out there. It took the combined might of both Super Sonic and Super Shadow to take him down. While Bahamut looked rather strong during his appearance in Advent Children, it was a very small cameo so there was only so much that he could do. I don’t think he has enough durability to stand up to The BioLizard’s attacks and eventually he will simply fall. There’s just no taking down a monster like this one. The BioLizard wins.