Segnodramon is the previous stage of Theridramon. While it lacks most of the power Theridramon has, it does share most of it's personality regardless of if it is weaker or not. It always terrorizes others by causing chaos wherever it goes, even if it's not taken seriously due to it's feathery appearance compared to other Dinosaur Digimon.
Digimon World: Bronze and Cobalt Versions
Segnodramon digivolves into Theridramon at Level 99 with 1,000,000 Dark Exp and from Velocidramon at Level 88 with 100,000 Dark Exp.