Board Thread:General Discussion/@comment-26973802-20150825031218

Here are mine for each game I've played:

Sonic the Hedgehog - Final battle

Sonic the Hedgehog 2 - Sky Chase

Sonic the Hedgehog 3 - Marble Garden Act 1

Sonic & Knuckles - Mecha Sonic/Doomsday Zone (I associate it more with Mecha Sonic coz I can never get to the Doomsday Zone)

Sonic Triple Trouble - Sunset Park Act 3, obviously

Sonic Adventure - Mystic Ruin, E Series battle

Sonic Heroes - Egg Emperor

Shadow the Hedgehog - Devil Doom

Sonic Riders - Sand Ruins

Sonic Riders: Zero Gravity - Master Core: ABIS

Sonic Rush - Exception (Final battle)

Sonic Rivals 2 - Ifrit

Sonic Unleashed - Dark Gaia Phase 3

Sonic Generations - Shadow

Sonic Lost World - Tropical Coast Act 1 