0:00 Intro
Sonic the Hedgehog (1991) (Re-release)
0:09 Dr. Robotnik (Boss of Green Hill Zone)
1:08 Dr. Robotnik (Boss of Marble Zone)
2:02 Dr. Robotnik (Boss of Spring Yard Zone)
2:58 Dr. Robotnik (Boss of Labyrinth Zone)
3:49 Dr. Robotnik (Boss of Star Light Zone)
5:02 Dr. Robotnik (Boss of Final Zone) (Final Boss)

Sonic the Hedgehog 2 (1992):
7:04 Drill Eggman (Boss of Emerald Hill Zone)
7:31 Water Eggman (Boss of Chemical Plant Zone)
7:56 Hammer Eggman (Boss of Aquatic Ruin Zone)
9:06 Catcher Eggman (Boss of Casino Night Zone)
9:59 Submarine Eggman (Boss of Hill Top Zone)
10:15 Drill Eggman II (Boss of Mystic Cave Zone)
10:36 Submarine Eggman II (Boss of Oil Ocean Zone)
11:09 Flying Eggman (Boss of Metropolis Zone)
11:56 Barrier Eggman (Boss of Wing Fortress Zone)
12:32 Robo Sonic (Boss of Death Egg Zone)
12:58 Death Egg Robot (Boss of Death Egg Zone) (Final Boss)

Sonic 3 & Knuckles:
14:36 Fire Breath (Boss of Angel Island Zone Act 1)
14:56 Flame Mobile (Boss of Angel Island Zone Act 2)
15:27 Big Shaker (Boss of Hydrocity Zone Act 1)
16:18 Screw Mobile (Boss of Hydrocity Zone Act 2)
18:21 Tunnelbot (Boss of Marble Garden Zone Act 1)
18:50 Drill Mobile (Boss of Marble Garden Zone Act 2)
19:46 Bowling Spin (Boss of Carnival Night Zone Act 1)
20:16 Big Icedus (Boss of Ice Cap Zone Act 1)
21:13 Freezer Mobile (Boss of Ice Cap Zone Act 2)
21:49 Twin Hammer (Boss of Launch Base Zone Act 1)
22:45 Beam Rocket (Boss of Launch Base Zone Act 2)
23:31 Big Arms (Boss of Launch Base Zone Act 2)
24:33 Hei Hou (Boss of Mushroom Hill Zone Act 1)
24:52 Jet Mobile (Boss of Mushroom Hill Zone Act 2)
25:20 Gapsule (Boss of Flying Battery Zone Act 1)
25:50 Barrier Eggman (Boss of Flying Battery Zone Act 2)
26:36 Hang Mobile (Boss of Flying Battery Zone Act 2)
27:18 Guardian (Boss of Sandopolis Zone Act 1)
28:15 Egg Golem (Boss of Sandopolis Zone Act 2)
28:58 Heat Arms (Boss of Lava Reef Zone Act 1)
29:55 Mecha Sonic (Boss of Sky Sanctuary Zone)
30:33 Super Mech Sonic (Final Boss) (Boss of Sky Sanctuary Zone)

Sonic Mania:
31:33 DD Wrecker (Boss of Green Hill Zone Act 1)
32:06 Death Egg Robot (Boss of Green Hill Zone Act 2)
32:22 Amoeba Droid (Boss of Chemical Plant Zone Act 1)
33:29 Mean Bean Machine (Boss of Chemical Plant Zone Act 2)
35:33 Heavy Gunner (Boss of Studiopolis Zone Act 1)
37:12 Weather Mobile (Boss of Studiopolis Zone Act 2)
39:03 Big Squeeze (Boss of Flying Battery Zone Act 1)
39:53 Spider Mobile (Boss of Flying Battery Zone Act 2)
40:56 Shiversaw (Boss of Press Garden Zone Act 1)
42:05 Heavy Shinobi (Boss of Press Garden Zone Act 2)
42:46 Hotaru Hi-Watt (Boss of Stardust Speedway Zone Act 1)
43:30 Metal Sonic (Boss of Stardust Speedway Zone Act 2)
45:33 Dive Eggman (Boss of Hydrocity Zone Act 1)
46:06 Laundro Mobile (Boss of Hydrocity Zone Act 2)
47:55 Uber Caterkiller (Boss of Mirage Saloon Zone Act 1)
48:22 Heavy Magician (Boss of Mirage Saloon Zone Act 2)
49:21 Meter Droid (Boss of Oil Ocean Zone Act 1)
49:45 Mega Octus (Boss of Oil Ocean Zone Act 2)
50:45 Drillerdroid (Boss of Lava Reef Zone Act 1)
51:40 Heavy Rider (Boss of Lava Reef Zone Act 2)
52:35 Egg Pistons MK. II (Boss of Metallica Madness Zone Act 1)
53:49 Gachapandora (Boss of Metallica Madness Zone Act 2)
55:06 Crimson Eye (Boss of Titanic Monarch Zone Act 1)
56:30 Phantom Egg (Final Boss) (Boss of Titanic Monarch Zone Act 2)
1:00:54 Ending

Here's all the bosses as Knuckles in Sonic the Hedgehog 1, 2, 3 & Knuckles and Mania. Footage was recorded on a Samsung Galaxy S20, PlayStation 3, Wii U & Switch at 1080p & 60fps.

Knuckles' image in the thumbnail is taken from artsonx:
https://www.deviantart.com/artsonx/ar...

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