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Tool-assisted game movies
When human skills are just not enough

Submission #2238: Dammit's Genesis Shinobi III - Return of the Ninja Master in 22:18.42

Console: Sega Genesis
Game name: Shinobi III - Return of the Ninja Master
Game version: USA
ROM filename: Shinobi III - Return of the Ninja Master (USA).bin
Branch:
Emulator: (unknown)
Movie length: 22:18.42
FrameCount: 80305
Re-record count: 56802
Author's real name: JK
Author's nickname: Dammit
Submitter: Dammit
Submitted at: 2009-04-21 19:52:57
Text last edited at: 2009-06-19 15:51:19
Text last edited by: sp00ky
Download: Download (6476 bytes)
Status: published
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Author's comments and explanations:
This is an improvement over the current movie by about 2m 45s. It follows the same goals, namely:

There are a gazillion things to discuss, so I'll focus on the following points.

Lag

This game doesn't have much lag, but much of what it does have doesn't show up on the lag counter. To deal with this, I made a lua script that counts frames when the ninja doesn't move, and also tracks speed in pixels per frame. You need Gens 11+ for lua.

http://lua.pastey.net/112784

http://lua.pastey.net/113140

Randomness

Some things like the timing of enemy attacks are random. So if you spot-weld improvements earlier in the movie, you get desyncs later. The randomness is determined at least in part by the input stream--even input that has no effect on gameplay affects the RNG. Crazy but true, it's possible to repair sync by adding or changing input that does nothing before the random thing gets spawned.

Tricks and glitches

Pallete error
In the horsey level, the last enemy is left for awhile to illustrate this.

Quickroll
Perform a double jump below a thin platform and the ninja will jolt upward while rising through it. Pressing into a wall during the zip will terminate the roll and return to standing position with full control.

Shuriken spamming
You can cancel the standing attack recovery with a jump and a jump with an attack. You can see where that's going. However, this doesn't help for the bosses with long invuln times.

Fastkicking
A typical jump kick moves at the same horizontal speed as running. But if the kick is done to the right while at less than running speed, it's 25% faster. (This seems to be a glitch because the same procedure to the left incurs a speed penalty.) Because of the delay in jumping up and landing, it's not faster than running over flat ground, but if done near the peak of a high jump, the penalty is less than one frame's worth of movement.

Recoilless kicks
It's possible to hit an enemy with a kick after touching ground and avoid the costly recoil. This is the fastest way to get rid of enemies that have 1 HP, but some open ground in front is required. In a couple cases it's also useful for hitting bosses that are too low to shoot.

Wallkicking
A sheer wall can be climbed by kicking into it on alternating frames. Gravitational acceleration continues, so it's best as a supplement rather than a substitute for jumping. Neofix demonstrated this in his movie but didn't put it to good use.

Upward zipping
This requires a low ceiling that opens up and becomes a vertical wall. Jump facing away from the wall so that the ninja's back is partly overlapping the wall in a nonsubversive manner. When the wall covers the ninja's back at foot level, do a turnaround kick into the wall. Do not press into the wall or the ninja will be ejected. The zipping lasts until the ejection is complete and is accelerated by wallkicking. It looks and sounds like wallkicking but is much faster and allows regular jumping, which is better than walljumping.

Walk through walls
Performing wallkicks while zipping into a ceiling can bring the ninja high enough to walk around in there. Running is not possible inside walls.


mmbossman: Excellent improvement, and a ton of fun to watch. Accepting.


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