199 frames (3.3167 seconds) saved from Level 6, though it ends there as Level 7 desyncs (not a full run). Level 6 is an RNG level we don't fully understand yet, but these were the fastest throws I could get in a single four-round game.
Found a new glitch that lets you hop on water under certain conditions. I've tentatively named it Phantom Log. Apparently when you touch the corner of a passing log's hitbox, you have an 11-frame window to hop onto a water tile adjacent to it. Though on frame 2318, Frogger seems to be able to stay on water for up to 40 frames with only one edge of a log near him. More testing is needed.
There are also water tiles like the first one I step on that are always safe to land on. Maybe the developers forgot to set them as hazardous.
Having hitboxes visible might make this easier to diagnose. They shouldn't be too hard to find with RAM Watch.
Uses BizHawk 2.6.3. Author's commentary is included as Subtitles. They appear at a Y-Position of 480 if your BizHawk window is big enough.
#36222432332944819 - Kirby's Adventure 2157 on BizHawk
Redid the whole glitch section to match FCEUX's less accurate emulation. The final Start input now is usually needed to be held for a second frame to prevent a crash (and allow a warp to the credits instead).
Unless frames were saved before the slope clip, I can't see any way to improve this further.
Made with BizHawk 1.11.6, but can run in BizHawk 2.2 by copying the input into a new bk2. BizHawk 2.2.1's minAnalogX&Y change breaks the Up and Left analog stick shortcuts, apparently due to a bug in Daikatana. But even this can be worked around by changing UDLR to analog stick positions, allowing it to sync in the newest BizHawk. I might provide an updated file in the future.
Includes author's commentary as Subtitles.
#23646612302554881 - Airlock submission on Level 3