Zagggon....Bowser is most definately a Koopa. Raziel is flawless, but he is correct here. Sure, he's not a dragon, but his skills are undeniable. His brute strength can overwhelm Seph's magic.

Raziel, please step in. You know more than me. You could probably reduce my arguement to something seems stupid, insane and pathetically funny. I know too little about Bowser. I know far more about Sephiroth.