Sea Egg is majorly changed according to Mystic's ancient instructions (excepting the flying FOF rock, I cared not for fucking around with FOFs).
Specifically:
* Faster paced fight.
* Instantly travels horizontal distance.
* Fakes no longer hurt papa, and spin out like a deflating balloon when he dies.
* New attack: When surfacing, produces an electric shockwave. Replaces underwater shock. Designed for new, shallow arena.
* Support for multiple bosses in the same map distinguished by parameter.
Will upload map to fight the new battle in on the MR.
Figure out the circuit length on map load
player->distancetofinish is now a total distance on circuit maps
some hacky alterations around circuit finish lines to correctly calculate distancetofinish
* Add more context clues to his fight, including an indicator for which laser attack is being used after chargeup.
* Make missiles able to vectorise him.
* Add another laser orb attack - vertical slice - and change the laser orb sequence to accurately reflect that horizontal is the hardest of the ones in 2.1.
* Optimise TC_BLINK, and fix an issue with TC_ALLWHITE that somehow avoided coming up in testing.
* Fix colorized bosses losing their colorization when flashing, by forcing TC_ALLWHITE.
* Remove PF_THOKKED every time a successful damage bounce occours.
* When this happens, spawn a number of particles based on thokitem at half scale! (Optimised, again, for MT_LHRT.)
* Also spawn these particles when a successful spring boost occours, as well as playing a twisted spring sound.
Also, some other related tweaks:
* Optimisations to A_VultureBlast, which was used as a base for the particle creation.
* Make the Metal Sonic boss use P_PlayerCanDamage instead of a custom, somewhat broken player damage detection mechanism.
* P_SpawnGhostMobj takes colorized into account.
* Fold Tails propeller damage into P_PlayerCanDamage.
* When performing an Attraction Blast, place the player in roll frames.
* Update all conditions preventing SH_PINK to incorporate thokitem and spinitem as well.
* Buff MT_LHRT travel distance at slow speeds.
I've tried to make this so it almost never under-compensates, and over-compensates very little where possible.
I don't think it's 1:1 to software's current behaviour, and probably never will be due to software being very strange.