There are no defined stats of Raijin, however there are some facts about him in battle.
HP - Ranges from 500-1200 in the first battle, 5500-23000 in the second battle, from 5000 - 25000 in the last battle. Strengths - Thunder Weaknesses - Poison AP - ranges from 10 to 20 Draw - Thunder, Thundara, Thundaga, Shell, Protect Locations - Balamb Hotel, Tear's Point / Lunatic Pandora