Moving platform · Frame Advance

A moving platform carries the player: standing on it adds its motion to the player’s own. Some follow a path whatever the player does; others fall, tip, or start moving when the player lands.

Games

Every claim about this mechanic, by game (3)

Super Mario Bros.: The Lost Levels 1986	The platforms' set-up, the enemy object loop, the enemies' movers, Bowser and the fireworks (`InitBalPlatform` through `RunFireworks`, 32 regions) are Super Mario Bros.'s instruction for instruction, with two changes: the enemy movers' jump table (`EnemyMovementSubs`) sends enemy 4, the upside-down piranha plant, to the new `MoveUpsideDownPiranhaP`, where Super Mario Bros. has `MoveNormalEnemy`; `MoveSwimmingCheepCheep` adds $40 to a swimming Cheep Cheep's vertical fraction each frame where Super Mario Bros. adds $20. Three of the regions are byte for byte the same, and the rest differ only in the addresses of their calls, jumps and tables.	Code
Super Mario Bros.: The Lost Levels 1986	`RunStarFlagObj` through `OffscreenBoundsCheck` are Super Mario Bros.'s with these changes: `RunStarFlagObj` sets off fireworks when the timer's last digit matches the coin tally's, where Super Mario Bros. matches the timer's last digit against 1, 3 and 6, and adds its points to the one player's score; `MovePiranhaPlant` moves red piranha plants (the patched palette) every frame; `BalancePlatform` leaves a platform alone when its partner is no balance platform; `OffscreenBoundsCheck` treats upside-down piranha plants like upright ones. `FirebarSpin` is byte for byte the same, and the moving platforms differ only in their addresses.	Code
Mega Man 5 1992	Mega Man 5's two checks for a platform object that the player meets moving vertically or horizontally, and their two distance helpers, follow Mega Man 4's test for test. Both walk the slots down from $17 and skip empty, off-screen, and non-solid ones. A one-way platform only catches a falling player, and the push is capped at 8 pixels. The changes: both checks also give up unless the moving object's own Y screen is 0. The horizontal check skips objects of type $02. The helper reads both of the shape's sizes from two tables through X, which it then sets to 0, the player's slot, where Mega Man 4 looks up the second size in the vertical check itself. The smaller box for a sliding player is chosen by `player_state` $02, where Mega Man 4 tests the player's sub-type for $10. And the horizontal distance helper no longer masks the screen difference to one bit. The four routines that push the player off a platform, which close Mega Man 4's region, sit after the position nudges in Mega Man 5.	Code