This Property entry details every Synchro Monster that cannot be Synchro Summoned. They are all Nomi or Semi-Nomi monsters that specify another way in which they can be Special Summoned.

All OCG/TCG "Cannot be Synchro Summoned" cards

 Japanese namePrimary typeSecondary typeAttributeTypeLevel/ RankATKDEF
Phantasmal Lord Ultimitl Bishbaalkin究極幻神アルティミトル・ビシバールキンSynchro Monster
Effect Monster
Ultimaya Tzolkinアルティマヤ・ツィオルキンSynchro Monster
Effect Monster

All Anime "Cannot be Synchro Summoned" cards

 Japanese nameSecondary typeAttributeTypeLevel/ RankATKDEF
Supreme King Z-ARC覇王龍ズァークDARKDragon00120000400000004000

All Manga "Cannot be Synchro Summoned" cards