Thunder Block (サンダーガード, Sandā Gādo?, lit. "Thunder Guard") is an ability which appears in Kingdom Hearts 358/2 Days. It allows the user to sometimes jolt enemies when guarding.
In Kingdom Hearts 358/2 Days, Thunder Block is an Ability Panel that has a 15% chance of jolting enemies. It must be linked to a Block ② or Block ④ panel.
The Thunder Block Ⓛ can be synthesized for 6800 munny once Roxas is promoted to Novice rank.