Author's comments and explanations:

Robotnik's Revenge v1: Fighting all Eggman battle machines.

For 2 players mode was necessary use Game Genie Code.

To get Tails as 2P in DeathEgg

004CE4:0003

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And this too, to make Tails inmortal

01FADE:4E71

Overwise, Tails you lose easily.

Select the survival mode for the challenge of not being touched by the enemy. I consider it more exciting.

Using self glitch in Aquatic Ruin Boss

Skipped Bosses
Mystic Cave
Metropolis
Star Light

Because allow me skip to 3 bosses (one of long duration)

Skippable Bosses but not
Spring Yard
Hill Top