Ok, it's been long enough since I did a TAS. I did my first attempt on VBA, but with GB emulation being more accurate with BizHawk, so I understand, I'm gonna restart on that.
First major change is going to be taking advantage of the glitch I discovered in the old WIP. Basically, by scrolling an egg just slightly off-screen as it is destroyed, I can cause that egg to reappear to be destroyed again, as many times as I need. It works better when scrolling left-right rather than up-down, so not every egg would be ideal for this, but it will save a lot of time trekking across the map as I can just pick on the first viable egg and farm it to clear the section.
Second thing is to try and cause the T-Rex to vanish in the Stage 2 boss fight. My basic understanding of how this would happen is by causing so much lag that it can't spawn at all. The most powerful ammo also causes a lot of lag when fired, and I can have up to 14 shots of it by the time I get to the T-Rex (plus other forms of ammo), so I should have more than enough to at least test it being possible - I did pull it off on a real PAL cart, so I have every confidence. I may be able to avoid picking up the 10-shot batch which is slightly out of the way, and cause it to happen with just the 4-shot batch that is nearer in Stage 2, but that will require some testing.
This run is gonna look very different to the WIP because of these changes, and with Grant going around the levels a lot less, it does risk the TAS being a bit less interesting to watch, but it does make it significantly faster to boot. At least there'll be more to show off than the NES version, plus that means more time to enjoy the rockin' chiptunes.