EarthBound & Mother 3
Guts is a stat in EarthBound and Mother 3, which both playable characters and enemies can have. It replaced the Fight stat from EarthBound Beginnings. Guts determines a character's chances of getting a SMAAAASH!! attack. Higher Guts will also give a character a higher chance to survive Mortal Damage with 1 HP.
Rowdy Mice, Deadly Mice, and the Plague Rat of Doom are notorious for having high Guts, which causes most of their attacks to hit with a SMAAAASH!!
The Guts stat can be raised permanently by consuming a Guts Capsule or Rock candy, or temporarily increased during battle with a Sudden Guts Pill. There are two weapons in the game that can increase Guts: the Gutsy Bat (for Ness), and the Magic Fry Pan (for Paula).