Grenades explode for damage equal to their current HP. If the Grenade's HP is high, it could put Wound status on a player with one hit.
It is only fought in a huge forest directly west of the Veldt, and south of the Phantom Forest. It is a difficult enemy to defeat at that stage of the game where it is encountered, because it has high HP and casts Self-Destruct when physically hit. It can use Mezmerize to Berserk characters, effectively forcing it to Self-destruct.
1st Turn: Blaze (33%) or Nothing (33%) or Mesmerize (33%)
2nd Turn: Blaze (33%) or Fireball (33%) or Nothing (33%)
3rd Turn: Blaze (33%) or Fireball (33%) or Nothing (33%)
If attacked by "Attack": Self-Destruct (33%)
Grenade from Final Fantasy VI appears as an enemy in Final Fantasy Record Keeper.