All savestates are for the Everdrive N8 Pro. 
State 0 - Mission 1-1 Boss,
State 1 - Mission 1-2 Start,
State 2 - Mission 1-2 Boss,
State 3 - Mission 1-3 Start,
State 4 - Mission 1-3 Boss,
State 5 - Mission 2-1 Start (includes character selection),
State 30 - Mission 2-1 Boss,
State 6 - Mission 2-2 Start,
State 7 - Mission 2-2 Boss, 
State 8 - Mission 2-3 Start, 
State 9 - Mission 2-3 Boss, 
State 10 - Mission 3-1 Start (includes character selection), 
State 11 - Mission 3-1 Boss, 
State 12 - Mission 3-2 Start, 
State 13 - Mission 3-2 Boss, 
State 14 - Mission 3-3 Start, 
State 15 - Mission 3-3 Boss, 
State 16 - Mission 4-1 Start, 
State 17 - Mission 4-1 Boss, 
State 18 - Mission 4-2 Start, 
State 19 - Mission 4-2 Boss, 
State 20 - Mission 4-3 Start, 
State 21 - Mission 4-3 Boss, 
State 22 - Mission 5-1 Start (includes character selection), 
State 23 - Mission 5-1 Boss, 
State 24 - Mission 5-2 Start, 
State 25 - Mission 5-2 Boss, 
State 26 - Mission 5-3 Start, 
State 27 - Mission 5-3 Boss, 
State 28 - Mission 6 Start, 
State 29 - Cobra Commander
State 31 - Middle of Mission 6, where you fly up and shoot the grenade thrower before it can hit you.

G.I. Joe Savestates Folder

ZeroThe14th

G.I. Joe: A Real American Hero

Nintendo Entertainment System

GallinoreanSaber

smartalec24

MixMastaPJ

USA / NTSC

NES Classic Mini

G.I. Joe

NESCardinality