Template:Sky Box Animals Natsu (Version X) is the Vongola Gear version of Natsu, Tsuna's Vongola Box Weapon. With the upgrade, Natsu has armor on his legs and is wearing armor with the Vongola crest on his forehead. Natsu is capable of merging directly with Tsuna for the latter's Cambio Forma.
Powers and Abilities
- Cambio Forma Version X: Tsuna's Cambio Forma Version Vongola Gear: Natsu merges directly with Tsuna and turns into arm thrusters to go with Tsuna's Vongola Gear X-Gloves. The arm thrusters are capable of emitting Flames powerful enough for Tsuna to escape black holes or balanced enough to allow Tsuna to fire Hard Flames from both of his gloves for techniques like the XX-Burner.
- At first, Tsuna could not call on Natsu due to the fact that he was unwilling to fight Enma and the Simon Famiglia.