Super Metroid · SNES · Sequence Break · Saves: ~15–20 minutes (varies by category and route) · Documented: 1999
Mockball lets Samus carry her full running speed into Morph Ball form by morphing in mid-air just before landing. Combined with wall-jumping, it allows sequence breaks that skip large parts of the intended item order.
Super Metroid's mockball is the canonical example of a physics exploit arising from how the game preserves momentum across mode transitions. The Morph Ball normally rolls slowly, but if Samus jumps while running and morphs just before she lands, she keeps her running speed and rolls along at full pace. This lets runners cross collapsing floors and reach items — most famously the early Super Missiles in Green Brinstar — before the game expects. A related trick, the speedball, does the same with Speed Booster momentum later in the game. Wall-jumping is separate but equally powerful: Super Metroid lets Samus kick off walls with precise timing, gaining height without the Hi-Jump Boots or Space Jump. Together, mockball and wall-jumping create a web of sequence breaks that allow runners to collect items in orders that contradict the game's intended progression.
The Morph Ball normally has a slow rolling speed. The game, however, keeps Samus's horizontal momentum when she transforms in mid-air, and if she lands already in ball form after a running jump, she continues at running speed. Morphing in the last moments before landing turns a slow crawl into a fast roll.
The best-known use is the early Super Missiles in Green Brinstar, where a crumbling bridge normally requires the Speed Booster to cross. Mockball lets runners take the item near the start of the game, rearranging the early item order. The Speed Booster equivalent, the speedball, carries even greater speed into ball form later in a run.
Super Metroid's wall-jump system is technically a designed mechanic — the instruction manual briefly mentions it — but the designers clearly did not anticipate how far skilled players would extend it. By repeatedly jumping and kicking against vertical walls with frame-precise timing, Samus can ascend vertical shafts of arbitrary height without the Spring Ball or Hi-Jump Boots, rendering large sections of the game's vertical exploration freely accessible far earlier than intended.
In current competitive routes the wall-jump is used to access Crateria and Norfair areas from the top that the game expects the player to reach from below after collecting multiple items. The combination of mockball for horizontal access and wall-jumping for vertical access means the early-game route can visit parts of the map the designers intended to be among the final areas, collecting late-game beams and suits while still holding the basic Morph Ball and Power Bomb as the primary toolkit.