Assist parts

Assist parts (or simply Parts as written on its clapperboard icon) are a mechanic in Super Mario Maker 2 allowing players to place certain blocks and power-ups in the levels of Story Mode to ease the completion. Assist parts are mentioned by Luigi after the player loses two lives in a level and after the Game Over screen, after which the player can press in the middle of a level to access them.

Building parts
The following power-ups or blocks may be used: Like in the normal level editor, Mr. Eraser can be used to clear any parts placed by the player.
 * Mushroom — 1
 * Super Star — 1
 * Fire Flower — 1
 * Theme-dependent power-up — 1
 * Hard Block — 99