Golden Axe/Enemies

Like many arcade games of the time there are only a few enemy types (seven in this case) which are then recolored to indicate their stats. The stronger an enemy the more damage it adds to the base values of its attacks. The numbers beside attacks indicate how many life bars (or fractions of life bars) it removes.

Heninger
You cannot block their dash attack.
 * Attack levels: Silver (D), Purple (D), Green (C), Red (A), Gold (C), Dark (B), Bronze (B)
 * Move levels: Silver (C), Purple (C), Green (C), Red (B), Gold (B), Dark (B), Bronze (C)
 * Combo attacks: 2HP (1/8 bar) per hit
 * Knockdown attack (combo finisher): 4HP (1/4 bar)
 * Dash attack: 4HP (1/4 bar)
 * Combo completed (two hits, knockdown): 8HP (1/2 bar)

Longmoan
Unlike the Heninger, the Longmoan's dash attack can be stopped, but only by your own dash attack.
 * Attack levels: Silver (D), Purple (D), Green (C), Red (A), Gold (C), Dark (B), Bronze (B)
 * Move levels: Silver (C), Purple (C), Green (C), Red (B), Gold (B), Dark (B), Bronze (C)
 * Combo attacks: 2HP (1/8 bar) per hit
 * Knockdown attack (combo finisher): 4HP (1/4 bar)
 * Dash attack: 4HP (1/4 bar)
 * Combo completed (two hits, knockdown): 8HP (1/2 bar)

Amazons
Dash attacks can't be blocked.
 * Attack levels: Purple (B), Green (B), Red (A), Dark (A)
 * Move levels: Purple (C), Green (B), Red (A), Dark (B)
 * Combo attacks: 2HP (1/8 bar) per hit
 * knockdown attack (combo finisher): 4HP (1/4 bar)
 * Dash attack: 4HP (1/4 bar)
 * Combo completed (two hits, knockdown): 8HP (1/2 bar)

Skeletons
Except for the downward thrust, Skeletons deal double the damage of any other enemy. Purple Skeletons are only seen in ../The Duel/. Note that Death Bringer's Skeletons can be killed, but they have 256 HP whereas Death Bringer himself has only 128 HP, meaning he usually dies first.
 * Attack levels: White (B), Purple (A)
 * Move levels: White (B), Purple (A)
 * Combo attacks: 4HP (1/4 bar)
 * Knockdown attack (combo finisher): 8HP (1/2 bar)
 * Jump slash: 12HP (3/4 bar)
 * Downward thrust: 16HP (1 bar)
 * Combo completed (four hits, knockdown): 24HP (1.5 bars)

Bad Brothers
Bad Brothers cannot ride Bizarrians. Dash attacks can be stopped.
 * Attack levels: Green (C), Silver (B), Red (A)
 * Move levels: all variants (C)
 * Dash attack: 8HP (1/2 bar)
 * All other attacks: 16HP (1 bar)

Knights
Cannot run or ride Bizarrians.
 * Attack levels: all variants (A)
 * Move levels: SIlver (B), Red (A), Gold (A)
 * All attacks: 16HP (1 bar)

Death Adder/Death Adder Jr.
Death Adder Jr. replaces Lt. Bitter as the boss of ../Stage 3/ in Beginner Mode. The only difference between them is the palette and how much health they have. Death Adder Jr. also cannot run or use the projectile attack. He's vulnerable when he throws a projectile, so hit him when he does this. The projectiles can be easily jumped over.
 * Attack level: all variants (A)
 * Move level: all variants (B)
 * Axe swing - 16HP (1 bar)
 * Projectile - 8HP (1/2 bar)

Death Bringer
Death Bringer can use your own magic against you! Whenever he knocks you down he'll cast a spell, which is always the highest level spell the players have access to. Early on he'll use Gilius', later he'll use Ax Battler's, and when he's almost dead he'll use Tyris' dragon.
 * Attack+move level: A
 * HP: 128
 * Swing attack: 16 HP (1 bar)
 * Explosion magic: 16 HP (1 bar)
 * Ground magic: 8 HP (1/2 bar)
 * Dragon magic: 40 HP (2 1/2 bars)