In Mario games on the GameCube (eg Mario Sunshine or Paper Mario: The Thousand Year Door), it is possible to complete the game, beat the final boss, and attain 100% completion and save such that the load-game-screen shows 100% or 120 stars, etc. However for the same games on the SNES and N64 (ie, Super Mario World, Mario 64, and Paper Mario), I cannot figure out a way to attain 100% completion because after the final boss is beaten, the games hang on the final screen after the credits instead of returning to the title-screen/menu where the player can save post-final-boss.
Is this correct or is there a way to save a 100% game?