1st Place MetalGarurumon [BT15] Deck Profile - Digimon Card Game 

I tried him out initially because it seems like a no-brainer when looking back on how old versions of Melga were built right? But it actually ended up bottom decking a lot of my Matts or other important pieces like my BT15 Melgas. Cool Boy can definitely be used and gain you momentum, but he might miss some of your key pieces on the initial hard slam.