u/Fantastic_Kick_2938

The cool thing about Cerberus Fotress is its mode change and movement. The trans kick bit was best for this combo because of the height change. When the bey does an X-Dash, the bey increases height by a millimeter. This is helpful becaus eit helps aid the bey to use the Free assist blade to "shrug off" some attacks. The use of the trans kick is also because of its agillity so it can evade attacks and increase the chabce of doin lg an X-Dash. Fortress was used because of its wider and smooth contact points compared to something like Perseus. This helps the bey have SOME attack potential while keeping the aim of defence.

(THIS IS ALL IN THEORY. Im too broke to actually test it out 🥺)